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 (37714)
Wiki.js is an open source wiki app built on Node.js. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing Authentication for Critical Function, Missing Authorization vulnerability in Yordam Information Technology Mobile Library Application allows Retrieve Embedded Sensitive Data.0. Rated high severity (CVSS 8.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
IBM Business Automation Workflow 22.0.2, 23.0.1, 23.0.2, and 24.0.0 could allow a privileged user to perform unauthorized activities due to improper client side validation. Rated medium severity (CVSS 4.9), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Improper authentication vulnerability in multiple digital video recorders provided by TAKENAKA ENGINEERING CO., LTD. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The WP Hardening - Fix Your WordPress Security plugin for WordPress is vulnerable to Security Feature Bypass in all versions up to, and including, 1.2.6. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Next.js is a React framework for building full-stack web applications. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Inappropriate implementation in Autofill in Google Chrome prior to 129.0.6668.58 allowed a remote attacker to perform UI spoofing via a crafted HTML page. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Sentry is a developer-first error tracking and performance monitoring platform. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity.
Sentry is a developer-first error tracking and performance monitoring platform. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity.
An attacker could write data to the user's clipboard, bypassing the user prompt, during a certain sequence of navigational events. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Improper authorization in Dynamics 365 Business Central resulted in a vulnerability that allows an authenticated attacker to elevate privileges over a network. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity.
An issue was discovered in the powermail extension through 12.4.0 for TYPO3. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An authentication issue was addressed with improved state management. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
This issue was addressed through improved state management. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
This issue was addressed with improved checks. Rated high severity (CVSS 7.1), this vulnerability is low attack complexity. No vendor patch available.
This issue was addressed by enabling hardened runtime. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
This issue was addressed through improved state management. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
This issue was addressed by removing the vulnerable code. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
This issue was addressed by adding an additional prompt for user consent. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
This issue was addressed through improved state management. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
This issue was addressed through improved state management. Rated medium severity (CVSS 6.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
This issue was addressed by restricting options offered on a locked device. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The issue was addressed with improved checks. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
The issue was addressed with improved checks. Rated medium severity (CVSS 4.4), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in GitLab CE/EE affecting all versions starting from 16.7 prior to 17.1.7, 17.2 prior to 17.2.5, and 17.3 prior to 17.3.2, where group runners information was disclosed to. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An Incorrect Access Control vulnerability was found in /music/ajax.php?action=delete_genre in Kashipara Music Management System v1.0. Rated medium severity (CVSS 5.9), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
An Incorrect Access Control vulnerability was found in /music/view_user.php?id=3 and /music/controller.php?page=edit_user&id=3 in Kashipara Music Management System v1.0. Rated medium severity (CVSS 4.2), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
Kashipara Music Management System v1.0 is vulnerable to Incorrect Access Control via /music/ajax.php?action=save_user. Rated medium severity (CVSS 4.7), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
Improper access control in Intel(R) RAID Web Console software all versions may allow an authenticated user to potentially enable denial of service via adjacent access. Rated medium severity (CVSS 5.7), this vulnerability is low attack complexity. No vendor patch available.
Improper access control in Intel(R) RAID Web Console all versions may allow an authenticated user to potentially enable denial of service via adjacent access. Rated medium severity (CVSS 5.7), this vulnerability is low attack complexity. No vendor patch available.
Improper access control in Intel(R) RAID Web Console software for all versions may allow an authenticated user to potentially enable escalation of privilege via local access. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
Improper access control in Intel(R) RAID Web Console software for all versions may allow an authenticated user to potentially enable denial of service via adjacent access. Rated medium severity (CVSS 5.7), this vulnerability is low attack complexity. No vendor patch available.
Improper access control in Intel(R) RAID Web Console all versions may allow an authenticated user to potentially enable information disclosure via local access. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
Mattermost Desktop App versions <=5.8.0 fail to safeguard screen capture functionality which allows an attacker to silently capture high-quality screenshots via JavaScript APIs. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An improper access control (IDOR) vulnerability in the /api-selfportal/get-info-token-properties endpoint in MFASOFT Secure Authentication Server (SAS) 1.8.x through 1.9.x before 1.9.040924 allows. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Certain models of D-Link wireless routers have a hidden functionality where the telnet service is enabled when the WAN port is plugged in. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
OMFLOW from The SYSCOM Group does not properly restrict access to the system settings modification functionality, allowing remote attackers with regular privileges to update system settings or create. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
In OpenDaylight Model-Driven Service Abstraction Layer (MD-SAL) through 13.0.1, a controller with a follower role can configure flow entries in an OpenDaylight clustering deployment. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
app/Controller/UserLoginProfilesController.php in MISP before 2.4.198 does not prevent an org admin from viewing sensitive login fields of another org admin in the same org. Rated medium severity (CVSS 4.9), this vulnerability is remotely exploitable, low attack complexity. This Incorrect Authorization vulnerability could allow attackers to bypass authorization checks to access restricted resources.
A flaw was found in Ansible, where sensitive information stored in Ansible Vault files can be exposed in plaintext during the execution of a playbook. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
A broken access control vulnerability exists in the latest version of lunary-ai/lunary. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.
An improper access control vulnerability exists in lunary-ai/lunary at the latest commit (a761d83) on the main branch. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.
A Server-Side Request Forgery (SSRF) vulnerability exists in berriai/litellm version 1.38.10. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
The MStore API - Create Native Android & iOS Apps On The Cloud plugin for WordPress is vulnerable to unauthorized user registration in all versions up to, and including, 4.15.3. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
ColdFusion versions 2023.6, 2021.12 and earlier are affected by an Improper Authentication vulnerability that could result in privilege escalation. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Use of Hard-coded Credentials vulnerability in TNB Mobile Solutions Cockpit Software allows Read Sensitive Strings Within an Executable.13. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Classified Listing - Classified ads & Business Directory Plugin plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on several functions like. 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.
A vulnerability in the MSC800 allows an unauthenticated attacker to modify the product’s IP address over Sopas ET. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered with pipeline execution policies in GitLab EE affecting all versions from 17.2 prior to 17.2.5, 17.3 prior to 17.3.2 which allows authenticated users to bypass variable. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An issue was discovered in GitLab CE/EE affecting all versions starting from 8.14 prior to 17.1.7, starting from 17.2 prior to 17.2.5, and starting from 17.3 prior to 17.3.2, which allows an attacker. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An issue in Mirapolis LMS 4.6.XX allows authenticated users to exploit an Insecure Direct Object Reference (IDOR) vulnerability by manipulating the ID parameter and increment STEP parameter, leading. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An improper authorization flaw exists in the Ansible Automation Controller. Rated medium severity (CVSS 6.6), this vulnerability is remotely exploitable. No vendor patch available.
An issue has been discovered in GitLab EE affecting all versions starting from 11.2 before 17.1.7, all versions starting from 17.2 before 17.2.5, all versions starting from 17.3 before 17.3.2. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in GitLab-EE starting with version 13.3 before 17.1.7, 17.2 before 17.2.5, and 17.3 before 17.3.2 that would allow an attacker to modify an on-demand DAST scan without. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
CVE-2024-45823 IMPACT An authentication bypass vulnerability exists in the affected product. Rated critical severity (CVSS 9.2), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
SolarWinds Access Rights Manager (ARM) was found to contain a hard-coded credential authentication bypass vulnerability. Rated high severity (CVSS 8.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Authorization Bypass Through User-Controlled Key vulnerability in Utarit Information SoliClub allows Exploiting Incorrectly Configured Access Control Security Levels.4.0 for iOS, before 5.2.1 for. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Authorization Bypass Through User-Controlled Key, Missing Authorization vulnerability in Utarit Information SoliClub allows Retrieve Embedded Sensitive Data.4.0 for iOS, before 5.2.1 for Android. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A vulnerability in the GlobalProtect portal in Palo Alto Networks PAN-OS software enables a malicious authenticated GlobalProtect user to impersonate another GlobalProtect user. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
RELY-PCIe v22.2.1 to v23.1.0 was discovered to contain incorrect access control in the mService function at phpinf.php. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability in the JSON-RPC API feature in Cisco Crosswork Network Services Orchestrator (NSO) and ConfD that is used by the web-based management interfaces of Cisco Optical Site Manager and. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to read any file in the file system of the underlying Linux operating system. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix IPsec RoCE MPV trace call Prevent the call trace below from happening, by not allowing IPsec creation over a slave,. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
An access control vulnerability was discovered in the Reports section due to a specific access restriction not being properly enforced for users with limited privileges. Rated medium severity (CVSS 5.8), this vulnerability is remotely exploitable. No vendor patch available.
In Eclipse Dataspace Components, from version 0.5.0 and before version 0.9.0, the ConsumerPullTransferTokenValidationApiController does not check for token validity (expiry, not-before, issuance. Rated medium severity (CVSS 5.1), this vulnerability is remotely exploitable, low attack complexity.
This vulnerability exists in Reedos aiM-Star version 2.0.1 due to missing restrictions for excessive failed authentication 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 Reedos aiM-Star version 2.0.1 due to improper validation of the ‘mode’ parameter in the API endpoint used during the registration process. 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 Reedos aiM-Star version 2.0.1 due to improper access controls on its certain API endpoints. Rated high severity (CVSS 8.7), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The WooCommerce Photo Reviews Premium plugin for WordPress is vulnerable to authentication bypass in all versions up to, and including, 1.3.13.2. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The HTML5 Video Player - mp4 Video Player Plugin and Block plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on multiple functions called via the. Rated medium severity (CVSS 5.3), 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.
The HTML5 Video Player - mp4 Video Player Plugin and Block plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'save_password' function in. 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.
In onCreate of SettingsHomepageActivity.java, there is a possible way to access the Settings app while the device is provisioning due to a missing permission check. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. This Missing Authorization vulnerability could allow attackers to access resources or perform actions without proper authorization checks.
In wifi_item_edit_content of styles.xml , there is a possible FRP bypass due to Missing check for FRP state. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. This Missing Authorization vulnerability could allow attackers to access resources or perform actions without proper authorization checks.
Missing authentication in Network Isolation of Ivanti EPM before 2022 SU6, or the 2024 September update allows a remote unauthenticated attacker to isolate managed devices from the network. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Missing authentication in Network Isolation of Ivanti EPM before 2022 SU6, or the 2024 September update allows a remote unauthenticated attacker to spoof Network Isolation status of managed devices. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An authentication bypass weakness in the message broker service of Ivanti Workspace Control before version 2025.2 (10.19.0.0) allows a local authenticated attacker to escalate their privileges. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
An incorrectly implemented authentication scheme that is subjected to a spoofing attack in the management console of Ivanti Workspace Control before version 2025.2 (10.19.0.0) allows a local. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
Shenzhen Haichangxing Technology Co., Ltd HCX H822 4G LTE Router M7628NNxISPxUIv2_v1.0.1557.15.35_P0 is vulnerable to Incorrect Access Control. Rated high severity (CVSS 8.0), this vulnerability is low attack complexity. No vendor patch available.
Microsoft AutoUpdate (MAU) Elevation of Privilege Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
Windows Mark of the Web Security Feature Bypass Vulnerability. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Microsoft Outlook for iOS Information Disclosure Vulnerability. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity.
Microsoft Power Automate Desktop Remote Code Execution Vulnerability. Rated high severity (CVSS 8.5), this vulnerability is remotely exploitable.
Windows Remote Desktop Licensing Service Denial of Service Vulnerability. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Microsoft Dynamics 365 Business Central Elevation of Privilege Vulnerability. Rated critical severity (CVSS 9.8), 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.
Azure Stack Hub Elevation of Privilege Vulnerability. Rated critical severity (CVSS 9.0), this vulnerability is remotely exploitable, low attack complexity.
Microsoft SQL Server Elevation of Privilege Vulnerability. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Windows Security Zone Mapping Security Feature Bypass Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity.
Computer Vision Annotation Tool (CVAT) is an interactive video and image annotation tool for computer vision. Rated medium severity (CVSS 6.4), 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.
An improper access control vulnerability [CWE-284] in FortiEDR Manager API 6.2.0 through 6.2.2, 6.0 all versions may allow in a shared environment context an authenticated admin with REST API. Rated low severity (CVSS 2.7), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Bareos is open source software for backup, archiving, and recovery of data for operating systems. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Quick Facts
- Typical Severity
- CRITICAL
- Category
- auth
- Total CVEs
- 37714