Authentication Bypass
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
How It Works
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications. Instead of cracking passwords through brute force, attackers manipulate the authentication process itself to gain unauthorized entry. This typically occurs through one of several pathways: exploiting hardcoded credentials embedded in source code or configuration files, manipulating parameters in authentication requests to skip verification steps, or leveraging broken session management that fails to properly validate user identity.
The attack flow often begins with reconnaissance to identify authentication endpoints and their underlying logic. Attackers may probe for default administrative credentials that were never changed, test whether certain URL paths bypass login requirements entirely, or intercept and modify authentication tokens to escalate privileges. In multi-step authentication processes, flaws in state management can allow attackers to complete only partial verification steps while still gaining full access.
More sophisticated variants exploit single sign-on (SSO) or OAuth implementations where misconfigurations in trust relationships allow attackers to forge authentication assertions. Parameter tampering—such as changing a "role=user" field to "role=admin" in a request—can trick poorly designed systems into granting elevated access without proper verification.
Impact
- Complete account takeover — attackers gain full control of user accounts, including administrative accounts, without knowing legitimate credentials
- Unauthorized data access — ability to view, modify, or exfiltrate sensitive information including customer data, financial records, and intellectual property
- System-wide compromise — admin-level access enables installation of backdoors, modification of security controls, and complete infrastructure takeover
- Lateral movement — bypassed authentication provides a foothold for moving deeper into networks and accessing additional systems
- Compliance violations — unauthorized access triggers breach notification requirements and regulatory penalties
Real-World Examples
CrushFTP suffered a critical authentication bypass allowing attackers to access file-sharing functionality without any credentials. The vulnerability enabled direct server-side template injection, leading to remote code execution on affected systems. Attackers actively exploited this in the wild to establish persistent access to enterprise file servers.
Palo Alto's Expedition migration tool contained a flaw permitting attackers to reset administrative credentials without authentication. This allowed complete takeover of the migration environment, potentially exposing network configurations and security policies being transferred between systems.
SolarWinds Web Help Desk (CVE-2024-28987) shipped with hardcoded internal credentials that could not be changed through normal administrative functions. Attackers discovering these credentials gained full administrative access to helpdesk systems containing sensitive organizational information and user data.
Mitigation
- Implement multi-factor authentication (MFA) — requires attackers to compromise additional verification factors beyond bypassed primary authentication
- Eliminate hardcoded credentials — use secure credential management systems and rotate all default credentials during deployment
- Enforce authentication on all endpoints — verify every request requires valid authentication; no "hidden" administrative paths should exist
- Implement proper session management — use cryptographically secure session tokens, validate on server-side, enforce timeout policies
- Apply principle of least privilege — limit damage by ensuring even authenticated users only access necessary resources
- Regular security testing — conduct penetration testing specifically targeting authentication logic and flows
Recent CVEs (7830)
A vulnerability, which was classified as critical, was found in 20120630 Novel-Plus up to 0e156c04b4b7ce0563bef6c97af4476fcda8f160. Rated medium severity (CVSS 6.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A vulnerability, which was classified as critical, has been found in 20120630 Novel-Plus up to 0e156c04b4b7ce0563bef6c97af4476fcda8f160.java. Rated medium severity (CVSS 6.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
A vulnerability was found in 20120630 Novel-Plus up to 0e156c04b4b7ce0563bef6c97af4476fcda8f160. Rated medium severity (CVSS 6.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in SeventhQueen Kleo.4.4. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A remote unauthenticated attacker may be able to change the IP adress of the device, and therefore affecting the availability of the device. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A vulnerability classified as critical has been found in youyiio BeyongCms 1.6.0. Rated medium severity (CVSS 5.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The Admin and Site Enhancements (ASE) WordPress plugin before 7.6.10 uses a hardcoded password in its Password Protection feature, allowing attacker to bypass the protection offered via a crafted. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
A vulnerability was found in codeprojects News Publishing Site Dashboard 1.0. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
A vulnerability, which was classified as critical, has been found in withstars Books-Management-System 1.0. Rated medium severity (CVSS 6.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
A vulnerability was found in withstars Books-Management-System 1.0. Rated medium severity (CVSS 6.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
NASA CryptoLib before 1.3.2 does not check whether the SA is in an operational state before use, possibly leading to a bypass of the Space Data Link Security protocol (SDLS). Rated medium severity (CVSS 4.9), this vulnerability is remotely exploitable. Public exploit code available and no vendor patch available.
In IZArc through 4.5, there is a Mark-of-the-Web Bypass Vulnerability. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Aeropage Sync for Airtable plugin for WordPress is vulnerable to unauthorized loss of data due to a missing capability check on the 'aeropageDeletePost' function in all versions up to, and. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. This Missing Authorization vulnerability could allow attackers to access resources or perform actions without proper authorization checks.
The Integração entre Eduzz e Woocommerce plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'wep_opcoes' function in all versions up to,. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
NETSCOUT nGeniusONE before 6.4.0 b2350 has Hardcoded Credentials that can be obtained from JAR files. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
NETSCOUT nGeniusONE before 6.4.0 b2350 has a Broken Authorization Schema for the report module. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue in Mytel Telecom Online Account System v1.0 allows attackers to bypass the OTP verification process via a crafted request. Rated high severity (CVSS 7.0), this vulnerability is remotely exploitable, no authentication required. Public exploit code available and no vendor patch available.
Dify is an open-source LLM app development platform. Rated high severity (CVSS 7.6), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.
A flaw was discovered in Moodle. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A flaw was found in Moodle. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A flaw was found in Moodle. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A flaw was found in Moodle. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A flaw was found in Moodle. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity.
A security vulnerability was discovered in Moodle that allows some users to access sensitive information about other students before they finish verifying their identities using two-factor. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A security vulnerability was discovered in Moodle that can allow hackers to gain access to sensitive information about students and prevent them from logging into their accounts, even after they had. Rated high severity (CVSS 7.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A flaw has been identified in Moodle where insufficient capability checks in certain grade reports allowed users without the necessary permissions to access hidden grades. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A security vulnerability was discovered in Moodle that allows students to enroll themselves in courses without completing all the necessary safety checks. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The WS Form LITE - Drag & Drop Contact Form Builder for WordPress plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the 'get_config' function in. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The JobSearch WP Job Board plugin for WordPress is vulnerable to authentication bypass in all versions up to, and including, 2.9.2. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
The BM Content Builder plugin for WordPress is vulnerable to unauthorized modification of data that can lead to privilege escalation due to a missing capability check on the. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in AlphaEfficiencyTeam Custom Login and Registration allows Exploiting Incorrectly Configured Access Control Security Levels.0.0. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Quantum StorNext Web GUI API before 7.2.4 grants access to internal StorNext configuration and unauthorized modification of some software configuration parameters via undocumented user credentials. Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Prevent Direct Access - Protect WordPress Files plugin for WordPress is vulnerable to unauthorized access and modification of data| due to a misconfigured capability check on the. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
In Sherpa Orchestrator 141851, a low-privileged user can elevate their privileges by creating new users and roles. Rated medium severity (CVSS 6.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
WGS-80HPT-V2 and WGS-4215-8T2S are missing authentication that could allow an attacker to create an administrator account without knowing any existing credentials. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
UNI-NMS-Lite uses hard-coded credentials that could allow an unauthenticated attacker to read, manipulate and create entries in the managed database. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
UNI-NMS-Lite uses hard-coded credentials that could allow an unauthenticated attacker to gain administrative privileges to all UNI-NMS managed devices. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Insecure Direct Object Reference (IDOR) in Codeastro Bus Ticket Booking System v1.0 allows unauthorized access to user profiles. Rated high severity (CVSS 8.0), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Missing Authorization vulnerability in Michael Revellin-Clerc Media Library Downloader allows Exploiting Incorrectly Configured Access Control Security Levels.3.1. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in vinodvaswani9 Bulk Assign Linked Products For WooCommerce allows Accessing Functionality Not Properly Constrained by ACLs.1. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in Carlo La Pera WP Customize Login Page allows Accessing Functionality Not Properly Constrained by ACLs.6.5. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in Peter Raschendorfer Smart Hashtags [#hashtagger] allows Exploiting Incorrectly Configured Access Control Security Levels.2.3. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in magepeopleteam Booking and Rental Manager allows Accessing Functionality Not Properly Constrained by ACLs.3.8. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in VW Themes Sirat allows Exploiting Incorrectly Configured Access Control Security Levels.5.1. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Improper access control of endpoint in HCL Leap allows certain admin users to import applications from the server's filesystem. Rated medium severity (CVSS 4.1), this vulnerability is remotely exploitable. No vendor patch available.
The Flynax Bridge plugin for WordPress is vulnerable to privilege escalation via account takeover in all versions up to, and including, 2.2.0. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Xelion Webchat plugin for WordPress is vulnerable to unauthorized modification of data that can lead to privilege escalation due to a missing capability check on the xwc_save_settings() function. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The Woocommerce Automatic Order Printing | ( Formerly WooCommerce Google Cloud Print) plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 4.1. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The Reales WP - Real Estate WordPress Theme theme for WordPress is vulnerable to unauthorized modification and loss of data due to a missing capability check on the 'reales_delete_file',. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue has been discovered in access controls could allow users to view certain restricted project information even when related features are disabled in GitLab EE, affecting all versions from 17.7. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
Mattermost versions 10.4.x <= 10.4.2, 10.5.x <= 10.5.0, 9.11.x <= 9.11.10 fail to properly validate permissions for the API endpoint /plugins/playbooks/api/v0/signal/keywords/ignore-thread, allowing. Rated low severity (CVSS 3.1), this vulnerability is remotely exploitable. No vendor patch available.
BEC Technologies Multiple Routers Authentication Bypass Vulnerability. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
CarlinKit CPC200-CCPA Wireless Hotspot Hard-Coded Credentials Authentication Bypass Vulnerability. Rated high severity (CVSS 8.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
DataEase is an open-source BI tool alternative to Tableau. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required. Public exploit code available and no vendor patch available.
A directory traversal vulnerability exists in Ivanti LANDesk Management Gateway through 4.2-1.9. Rated medium severity (CVSS 5.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
This vulnerability exists in Meon Bidding Solutions due to improper authorization controls on certain API endpoints for the initiation, modification, or cancellation operations. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
This vulnerability exists in Meon KYC solutions due to debug mode is enabled in certain API endpoints. Rated medium severity (CVSS 6.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
This vulnerability exists in the Meon KYC solutions due to transmission of sensitive data in plain text within the response payloads of certain API endpoints. Rated high severity (CVSS 8.7), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
This vulnerability exists in Meon KYC solutions due to improper handling of access and refresh tokens in certain API endpoints of authentication process. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
This vulnerability exists in Meon KYC solutions due to insufficient server-side validation of the Captcha in certain API endpoints. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
This vulnerability exists in Meon KYC solutions due to missing restrictions on the number of incorrect One-Time Password (OTP) attempts through certain API endpoints of login process. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A vulnerability was found in mod_proxy_cluster. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The WordPress Simple Shopping Cart plugin for WordPress is vulnerable to product price manipulation in all versions up to, and including, 5.1.2. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An unauthenticated remote attacker can bypass the user management in CODESYS Visualization and read visualization template files or static elements by means of forced browsing. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Missing authorization vulnerability in synocopy in Synology DiskStation Manager (DSM) before 7.1.1-42962-8, 7.2.1-69057-7 and 7.2.2-72806-3 allows remote attackers to read arbitrary files via. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A security vulnerability has been identified in HPE Cray Data Virtualization Service (DVS). Rated medium severity (CVSS 6.8), this vulnerability is no authentication required. No vendor patch available.
A vulnerability in the cmdb service of the HPE Performance Cluster Manager (HPCM) could allow an attacker to gain access to an arbitrary file on the server host. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Francois Jacquet RosarioSIS v12.0.0 was discovered to contain a content spoofing vulnerability in the Theme configuration under the My Preferences module. Rated high severity (CVSS 7.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Codemers KLIMS 1.6.DEV lacks a proper access control mechanism, allowing a normal KLIMS user to perform all the actions that an admin can perform, such as modifying the configuration, creating a. Rated high severity (CVSS 7.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
ManageWiki is a MediaWiki extension allowing users to manage wikis. Rated medium severity (CVSS 4.6), this vulnerability is remotely exploitable, low attack complexity.
OctoPrint provides a web interface for controlling consumer 3D printers. Rated medium severity (CVSS 4.3), this vulnerability is no authentication required, low attack complexity.
TOTOLINK A810R V4.1.2cu.5182_B20201026 was discovered to contain a hardcoded password for the telnet service in product.ini. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required. Public exploit code available and no vendor patch available.
Missing Authorization vulnerability in codepeople Appointment Booking Calendar allows Accessing Functionality Not Properly Constrained by ACLs.3.92. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in Dotstore Advanced Linked Variations for Woocommerce allows Exploiting Incorrectly Configured Access Control Security Levels.0.3. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in alttextai Download Alt Text AI allows Exploiting Incorrectly Configured Access Control Security Levels.9.93. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An authorization bypass in Unblu Spark allows a participant of a conversation to replace an existing, uploaded file. Rated high severity (CVSS 7.0), this vulnerability is remotely exploitable. No vendor patch available.
It technically possible for a user to upload a file to a conversation despite the file upload functionality being disabled. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability, which was classified as problematic, has been found in YXJ2018 SpringBoot-Vue-OnlineExam 1.0. Rated medium severity (CVSS 6.3), this vulnerability is remotely exploitable, no authentication required. Public exploit code available and no vendor patch available.
Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners. Rated medium severity (CVSS 6.0), this vulnerability is low attack complexity. No vendor patch available.
Incorrect access control in laskBlog v2.6.1 allows attackers to access all usernames via a crafted input. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Incorrect access control in laskBlog v2.6.1 allows attackers to arbitrarily delete user accounts via a crafted request. Rated medium severity (CVSS 6.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability in the HPE Performance Cluster Manager (HPCM) GUI could allow an attacker to bypass authentication. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
The FileWave Windows client before 16.0.0, in some non-default configurations, allows an unprivileged local user to escalate privileges to SYSTEM. Rated high severity (CVSS 8.1), this vulnerability is no authentication required. No vendor patch available.
mojoPortal <=2.9.0.1 is vulnerable to Directory Traversal via BetterImageGallery API Controller - ImageHandler Action. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required. Public exploit code available and EPSS exploitation probability 12.7%.
An improper authorization vulnerability in Dremio Software allows authenticated users to delete arbitrary files that the system has access to, including system files and files stored in remote. Rated high severity (CVSS 8.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Yi IOT XY-3820 6.0.24.10 is vulnerable to Remote Command Execution via the "cmd_listen" function located in the "cmd" binary. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Incorrect Authorization vulnerability in the OpenText Content Server REST API on Windows, Linux allows users without the appropriate permissions to remove external collaborators.2-24.4. Rated medium severity (CVSS 5.5), this vulnerability is remotely exploitable. No vendor patch available.
In Soffid Console 3.6.31 before 3.6.32, authorization to use the pam service is mishandled. Rated low severity (CVSS 2.5). No vendor patch available.
An Improper Authorization vulnerability was identified in the EOL OVA based connect component which is deployed for installation purposes in the customer internal network. Rated medium severity (CVSS 6.1), this vulnerability is no authentication required. No vendor patch available.
A vulnerability was found in kuangstudy KuangSimpleBBS 1.0. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
Quick Facts
- Typical Severity
- CRITICAL
- Category
- auth
- Total CVEs
- 7830