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 (37711)
TYPO3 is a free and open source Content Management Framework. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Insecure permissions in the Bluetooth Low Energy (BLE) component of Fire-Boltt Artillery Smart Watch NJ-R6E-10.3 allow attackers to cause a Denial of Service (DoS). Rated high severity (CVSS 8.2), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Visual C++ Redistributable Installer Elevation of Privilege Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
Code Integrity Guard Security Feature Bypass Vulnerability. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
Windows Scripting Engine Security Feature Bypass Vulnerability. Rated high severity (CVSS 8.4), this vulnerability is no authentication required, low attack complexity.
BitLocker Security Feature Bypass Vulnerability. Rated medium severity (CVSS 6.4), this vulnerability is no authentication required.
Microsoft SharePoint Elevation of Privilege Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
Missing authentication for critical function in Visual Studio Code extension for Arduino allows an unauthenticated attacker to perform remote code execution through network attack vector. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Windows Remote Desktop Services Tampering Vulnerability. Rated high severity (CVSS 7.4), this vulnerability is remotely exploitable, no authentication required.
Azure Stack Hyperconverged Infrastructure (HCI) Elevation of Privilege Vulnerability. Rated high severity (CVSS 8.8), this vulnerability is low attack complexity. This Missing Authorization vulnerability could allow attackers to access resources or perform actions without proper authorization checks.
Windows Kerberos Elevation of Privilege Vulnerability. Rated medium severity (CVSS 6.6), this vulnerability is remotely exploitable.
Windows Netlogon Elevation of Privilege Vulnerability. Rated critical severity (CVSS 9.0), this vulnerability is low attack complexity. This Improper Authentication vulnerability could allow attackers to bypass authentication mechanisms to gain unauthorized access.
Windows Resume Extensible Firmware Interface Security Feature Bypass Vulnerability. Rated medium severity (CVSS 6.7), this vulnerability is low attack complexity.
Windows Resume Extensible Firmware Interface Security Feature Bypass Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
Windows Resume Extensible Firmware Interface Security Feature Bypass Vulnerability. Rated medium severity (CVSS 6.7), this vulnerability is low attack complexity. This Integer Overflow vulnerability could allow attackers to cause unexpected behavior through arithmetic overflow.
Windows Hyper-V Security Feature Bypass Vulnerability. Rated high severity (CVSS 7.1), this vulnerability is no authentication required. No vendor patch available.
The Photo Gallery, Images, Slider in Rbs Image Gallery plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the ajaxGetGalleryJson() function in all. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The LatePoint plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 5.0.12. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A vulnerability has been identified in SENTRON 7KM PAC3200 (All versions). Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
SSL Pinning Bypass in eWeLink Some hardware products allows local ATTACKER to Decrypt TLS communication and Extract secrets to clone the device via Flash the modified firmware. Rated high severity (CVSS 7.0), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Improper check for exception conditions in Knox Guard prior to SMR Oct-2024 Release 1 allows physical attackers to bypass Knox Guard in a multi-user environment. Rated low severity (CVSS 2.4), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
A security flaw has been discovered in Solvait version 24.4.2 that allows an attacker to elevate their privileges. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Discourse is an open source platform for community discussion. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Improper access removal handling in firmware of some Solidigm DC Products may allow an attacker with physical access to gain unauthorized access. Rated medium severity (CVSS 6.7). No vendor patch available.
Improper access control validation in firmware of some Solidigm DC Products may allow an attacker with physical access to gain unauthorized access or an attacker with local access to potentially. Rated high severity (CVSS 7.0), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Missing Authentication - User & System Configuration. Rated high severity (CVSS 8.3), this vulnerability is no authentication required. No vendor patch available.
IoT Haat Smart Plug IH-IN-16A-S v5.16.1 is vulnerable to Authentication Bypass by Capture-replay. Rated high severity (CVSS 8.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Vulnerability in Distro Linux Workbooth v2.5 that allows to escalate privileges to the root user by manipulating the network configuration script. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
Information disclosure while sending implicit broadcast containing APP launch information. Rated medium severity (CVSS 6.1), this vulnerability is low attack complexity. No vendor patch available.
A vulnerability classified as problematic was found in Sovell Smart Canteen System up to 3.0.7303.30513. Rated medium severity (CVSS 6.3), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
Authorization Bypass Through User-Controlled Key vulnerability in Dimitri Grassi Salon booking system salon-booking-system.9. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The Rank Math SEO - AI SEO Tools to Dominate SEO Rankings plugin for WordPress is vulnerable to unauthorized modification and loss of data due to a missing capability check on the 'update_metadata'. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Missing Authorization vulnerability could allow attackers to access resources or perform actions without proper authorization checks.
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in The Wikimedia Foundation Mediawiki - PageTriage allows Authentication Bypass.39.X before 1.39.9, from 1.41.X before 1.41.3,. Rated medium severity (CVSS 6.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in SonarSource SonarQube before 9.9.5 LTA and 10.x before 10.5. Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Improper Authentication vulnerability in Microchip TimeProvider 4100 (login modules) allows Session Hijacking.0 before 2.4.7. Rated high severity (CVSS 8.7), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
Lif Authentication Server is a server used by Lif to do various tasks regarding Lif accounts. Rated medium severity (CVSS 6.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Improper Authentication vulnerability could allow attackers to bypass authentication mechanisms to gain unauthorized access.
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity.
** UNSUPPORTED WHEN ASSIGNED ** This vulnerability exists in D3D Security IP Camera D8801 due to usage of insecure Real-Time Streaming Protocol (RTSP) version for live video streaming. 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 the Shilpi Net Back Office due to improper access controls on certain API endpoints. Rated high severity (CVSS 7.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
This vulnerability exists in Shilpi Client Dashboard due to missing restrictions for incorrect login attempts on its API based login. 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 Shilpi Client Dashboard due to lack of authorization for modification and cancellation requests through certain API endpoints. Rated high severity (CVSS 7.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Cleartext Storage of Sensitive Information, Exposure of Sensitive Information Through Data Queries vulnerability in Finrota Netahsilat allows Retrieve Embedded Sensitive Data, Authentication Bypass,. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
This vulnerability exists in Shilpi Client Dashboard due to improper handling of multiple parameters in the API endpoint. Rated high severity (CVSS 7.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The web service for ONS-S8 - Spectra Aggregation Switch includes functions which do not properly validate user input, allowing an attacker to traverse directories, bypass authentication, and execute. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
DrayTek Vigor310 devices through 4.3.2.6 use unencrypted HTTP for authentication requests. Rated high severity (CVSS 8.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
TEM Opera Plus FM Family Transmitter allows access to an unprotected endpoint that allows MPFS File System binary image upload without authentication. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
In Mastodon 4.1.6, API endpoint rate limiting can be bypassed by setting a crafted HTTP request header. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable. No vendor patch available.
The Eufy Homebase 2 before firmware version 3.3.4.1h creates a dedicated wireless network for its ecosystem, which serves as a proxy to the end user's primary network. Rated high severity (CVSS 8.2), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Bandisoft BandiView 7.05 is vulnerable to Incorrect Access Control in sub_0x3d80fc via a crafted POC file. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Pomerium is an identity and context-aware access proxy. Rated medium severity (CVSS 6.8), this vulnerability is remotely exploitable. No vendor patch available.
A vulnerability in the Cisco AnyConnect VPN server of Cisco Meraki MX and Cisco Meraki Z Series Teleworker Gateway devices could allow an unauthenticated, remote attacker to cause a DoS condition for. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A vulnerability in a specific REST API endpoint of Cisco NDFC could allow an authenticated, low-privileged, remote attacker to upload or delete files on an affected device. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability in the REST API endpoints of Cisco Nexus Dashboard could allow an authenticated, low-privileged, remote attacker to perform limited Administrator actions on an affected device. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability in a specific REST API endpoint of Cisco NDFC could allow an authenticated, low-privileged, remote attacker to learn sensitive information on an affected device. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability in the web-based management interface of Cisco Small Business RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers could allow an authenticated, remote attacker to elevate. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Incorrect Permission Assignment for Critical Resource vulnerability in OpenText™ Vertica could allow Privilege Abuse and result in unauthorized access or privileges to Vertica agent apikey.0 through. Rated medium severity (CVSS 6.9). No vendor patch available.
Jenkins OpenId Connect Authentication Plugin 4.354.v321ce67a_1de8 and earlier does not check the `iss` (Issuer) claim of an ID Token, allowing attackers to subvert the authentication flow,. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
Jenkins OpenId Connect Authentication Plugin 4.354.v321ce67a_1de8 and earlier does not check the `aud` (Audience) claim of an ID Token, allowing attackers to subvert the authentication flow,. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
If an attempt is made to create an item of a type prohibited by `ACL#hasCreatePermission2` or `TopLevelItemDescriptor#isApplicableIn(ItemGroup)` through the Jenkins CLI or the REST API and either of. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An unauthenticated remote attacker may use the devices traffic capture without authentication to grab plaintext administrative credentials. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An unauthenticated remote attacker may use a missing authentication for critical function vulnerability to reboot or erase the affected devices resulting in data loss and/or a DoS. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Permissions bypass in M-Files Connector for Copilot before version 24.9.3 allows authenticated user to access limited amount of documents via incorrect access control list calculation. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability in the legacy chat component of Mitel MiContact Center Business through 10.1.0.4 could allow an unauthenticated attacker to conduct an unauthorized access attack due to inadequate. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A user who enables full-screen mode on a specially crafted web page could potentially be prevented from exiting full screen mode. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
OSS Endpoint Manager is an endpoint manager module for FreePBX. Rated medium severity (CVSS 6.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The WebDAV service in Infinera TNMS (Transcend Network Management System) 19.10.3 allows a low-privileged remote attacker to conduct unauthorized file operations, because of execution with. Rated critical severity (CVSS 9.0), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
eLabFTW is an open source electronic lab notebook for research labs. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability in Kaiten version 57.131.12 and earlier allows attackers to bypass the PIN code authentication mechanism. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The WordPress & WooCommerce Affiliate Program plugin for WordPress is vulnerable to authentication bypass in all versions up to, and including, 8.4.1. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Spice Starter Sites plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the spice_starter_sites_importer_creater function in all versions. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Wechat Social login plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 1.3.0. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Soumettre.fr plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the soumettre_disconnect_gateway function in all versions up to, and. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The KB Support - WordPress Help Desk and Knowledge Base plugin for WordPress is vulnerable to unauthorized access and modification of data due to a missing capability check on the. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The KB Support - WordPress Help Desk and Knowledge Base plugin for WordPress is vulnerable to unauthorized modification and loss of data due to a missing capability check on several functions in the. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
RevoWorks Cloud Client 3.0.91 and earlier contains an incorrect authorization vulnerability. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in Infinera hiT 7300 5.60.50. Rated high severity (CVSS 8.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in Atos Eviden iCare 2.7.1 through 2.7.11. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Scout is a web-based visualizer for VCF-files. Rated low severity (CVSS 3.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.
Computer Vision Annotation Tool (CVAT) is an interactive video and image annotation tool for computer vision. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. This Incorrect Authorization vulnerability could allow attackers to bypass authorization checks to access restricted resources.
Sourcecodester Online Medicine Ordering System 1.0 is vulnerable to Incorrect Access Control. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
PIX-LINK LV-WR22 RE3002-P1-01_V117.0 is vulnerable to Improper Access Control. Rated high severity (CVSS 8.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Certain switch models from PLANET Technology lack proper access control in firmware upload and download functionality, allowing unauthenticated remote attackers to download and upload firmware and. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The swctrl service is used to detect and remotely manage PLANET Technology devices. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
A Local File Inclusion vulnerability exists in parisneo/lollms-webui versions below v9.8. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Certain switch models from PLANET Technology have an SSH service that improperly handles insufficiently authenticated connection requests, allowing unauthorized remote attackers to exploit this. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Certain switch models from PLANET Technology have a Hard-coded community string in the SNMPv1 service, allowing unauthorized remote attackers to use this community string to access the SNMPv1 service. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Certain switch models from PLANET Technology have a Hard-coded Credential in the password recovering functionality, allowing an unauthenticated attacker to connect to the device via the serial. Rated medium severity (CVSS 6.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Certain switch models from PLANET Technology have a hard-coded credential in the specific command-line interface, allowing remote attackers with regular privilege to log in with this credential and. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability was found in SourceCodester Online Railway Reservation System 1.0 and classified as critical.php. 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 SourceCodester Online Railway Reservation System 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
- 37711