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 (7676)
An arbitrary file write was found in Keyfactor SignServer versions prior to 7.3.2. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A local file enumeration was found in Keyfactor SignServer versions prior to 7.3.2 .The property VISIBLE_SIGNATURE_CUSTOM_IMAGE_PATH, which exists in the PDFSigner and the PAdESSigner, can be set to. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Dell Alienware Command Center 6.x (AWCC), versions prior to 6.10.15.0, contain an Improper Access Control vulnerability. Rated medium severity (CVSS 6.6), this vulnerability is low attack complexity. No vendor patch available.
The issue was addressed by refusing external connections by default. Rated high severity (CVSS 8.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Typebot is an open-source chatbot builder. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable. Public exploit code available and no vendor patch available.
Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to properly validate team membership permissions in the Add Channel Member API which allows users from one team to access user metadata. Rated low severity (CVSS 3.1), this vulnerability is remotely exploitable. No vendor patch available.
A vulnerability in Cisco Catalyst Center Virtual Appliance could allow an authenticated, remote attacker to elevate privileges to Administrator on an affected system. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
ZITADEL is an open source identity management platform. Rated high severity (CVSS 7.4), this vulnerability is remotely exploitable, low attack complexity. This Improper Authentication vulnerability could allow attackers to bypass authentication mechanisms to gain unauthorized access.
Insecure Direct Object Reference (IDOR) vulnerability in DeporSite of T-INNOVA. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing authorization in PostgreSQL CREATE STATISTICS command allows a table owner to achieve denial of service against other CREATE STATISTICS users by creating in any schema. Rated low severity (CVSS 3.1), this vulnerability is remotely exploitable. No vendor patch available.
pgAdmin <= 9.9 is affected by a vulnerability in the LDAP authentication mechanism allows bypassing TLS certificate verification. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Gallery Plugin for WordPress - Envira Photo Gallery plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on several functions in all versions. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in jetmonsters JetFormBuilder jetformbuilder allows Exploiting Incorrectly Configured Access Control Security Levels.5.3. Rated medium severity (CVSS 6.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in WebToffee Order Export & Order Import for WooCommerce order-import-export-for-woocommerce allows Exploiting Incorrectly Configured Access Control Security. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in Pluggabl Booster for WooCommerce woocommerce-jetpack allows Exploiting Incorrectly Configured Access Control Security Levels.4.0. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in YOP YOP Poll yop-poll allows Exploiting Incorrectly Configured Access Control Security Levels.5.38. 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 codepeople Contact Form Email contact-form-to-email allows Exploiting Incorrectly Configured Access Control Security Levels.3.58. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in QuantumCloud ChatBot chatbot allows Exploiting Incorrectly Configured Access Control Security Levels.3.9. 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 Ays Pro Survey Maker survey-maker allows Exploiting Incorrectly Configured Access Control Security Levels.1.9.4. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in wpkoithemes WPKoi Templates for Elementor wpkoi-templates-for-elementor allows Exploiting Incorrectly Configured Access Control Security Levels.4.4. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in EDGARROJAS WooCommerce PDF Invoice Builder woo-pdf-invoice-builder allows Exploiting Incorrectly Configured Access Control Security Levels.2.150. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in N-Media Frontend File Manager nmedia-user-file-uploader allows Exploiting Incorrectly Configured Access Control Security Levels.2. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in PluginEver WP Content Pilot wp-content-pilot allows Exploiting Incorrectly Configured Access Control Security Levels.1.7. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in codepeople Appointment Booking Calendar appointment-booking-calendar allows Exploiting Incorrectly Configured Access Control Security Levels.3.95. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in Jeroen Schmit Theater for WordPress theatre allows Exploiting Incorrectly Configured Access Control Security Levels.18.8. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Convert WebP & AVIF | Quicq | Best image optimizer and compression plugin | Improve your Google Pagespeed plugin for WordPress is vulnerable to unauthorized modification of data due to a missing. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The WP Headless CMS Framework plugin for WordPress is vulnerable to protection mechanism bypass in all versions up to, and including, 1.15. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Survey Maker plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the 'ays_survey_show_results' AJAX endpoint in all versions up to, and. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Welcart e-Commerce plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the 'usces_export' action in all versions up to, and including, 2.11.24. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Survey Maker plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the deactivate_plugin_option() function in all versions up to, and. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Page Builder: Pagelayer - Drag and Drop website builder plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.0.5 via the. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An authentication bypass vulnerability has been identified in certain DSL series routers, may allow remote attackers to gain unauthorized access into the affected system. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Frappe Learning is a learning system that helps users structure their content. Rated low severity (CVSS 1.2), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.
sudo-rs is a memory safe implementation of sudo and su written in Rust. Rated medium severity (CVSS 4.4), this vulnerability is low attack complexity. No vendor patch available.
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Rated high severity (CVSS 7.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Dell Data Lakehouse, versions prior to 1.6.0.0, contain(s) an Improper Access Control vulnerability. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A flaw has been found in DinukaNavaratna Dee Store 1.0. Rated medium severity (CVSS 6.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A vulnerability was detected in itsourcecode Online Voting 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.
A SQL injection vulnerability exists in the login functionality of WellSky Harmony version 4.1.0.2.83 within the 'xmHarmony.asp' endpoint. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Fujitsu / Fsas Technologies iRMC S6 on M5 before 1.37S mishandles Redfish/WebUI access if the length of a username is exactly 16 characters. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable. No vendor patch available.
An Authentication Bypass issue in CentralSquare Community Development 19.5.7 allows attackers to access the admin panel without admin credentials. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A vulnerability in FiberHome GPON ONU HG6145F1 RP4423 allows the device's factory default Wi-Fi password (WPA/WPA2 pre-shared key) to be predicted from the SSID. 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.
N-central < 2025.4 is vulnerable to authentication bypass via path traversal. Rated critical severity (CVSS 9.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Incorrect access control in SIMICAM v1.16.41-20250725, KEVIEW v1.14.92-20241120, ASECAM v1.14.10-20240725 allows attackers to access sensitive API endpoints without authentication. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Tenda AC15 v15.03.05.18_multi) issues an authentication cookie that exposes the account password hash to the client and uses a short, low-entropy suffix as the session identifier. 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.
Improper Authentication vulnerability in TYPO3 Extension "Modules" codingms/modules.3.11, from 5.0.0 before 5.7.4, from 6.0.0 before 6.4.2, from 7.0.0 before 7.5.5. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: Fix peer lookup in ath12k_dp_mon_rx_deliver_msdu() In ath12k_dp_mon_rx_deliver_msdu(), peer lookup fails because. No vendor patch available.
Apache OpenOffice documents can contain links. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Apache OpenOffice documents can contain links to other files. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Apache OpenOffice Calc spreadsheet can contain links to other files, in the form of "external data sources". Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Apache OpenOffice documents can contain links. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Apache OpenOffice documents can contain links. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Payment Plugins Braintree For WooCommerce plugin for WordPress is vulnerable to authorization bypass due to a missing capability check on the wc-braintree/v1/3ds/vaulted_nonce REST API endpoint. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The WP Import - Ultimate CSV XML Importer for WordPress plugin for WordPress is vulnerable to unauthorized access of sensitive information due to a missing authorization check on the showsetting(). Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The Booking Calendar | Appointment Booking | Bookit plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Alt Text Generator AI - Auto Generate & Bulk Update Alt Texts For Images plugin for WordPress is vulnerable to unauthorized loss of data due to a missing capability check on the. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The GeoDirectory - WP Business Directory Plugin and Classified Listings Directory plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.8.139. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The Wishlist and Save for later for Woocommerce plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.1.22 via the. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A health check port on Zscaler Client Connector on Windows, versions 4.6 < 4.6.0.216 and 4.7 < 4.7.0.47, which under specific circumstances was not released after use, allowed traffic to potentially. Rated medium severity (CVSS 5.2), this vulnerability is low attack complexity. No vendor patch available.
A vulnerability has been identified in LOGO!. Rated high severity (CVSS 7.1), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
A vulnerability has been identified in LOGO!. Rated high severity (CVSS 7.2), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Adobe Pass versions 3.7.3 and earlier are affected by an Incorrect Authorization vulnerability. Rated high severity (CVSS 7.1), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Improper validation of generative ai output in GitHub Copilot and Visual Studio Code allows an authorized attacker to bypass a security feature locally. Rated medium severity (CVSS 5.0), this vulnerability is low attack complexity. No vendor patch available.
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Improper access control in Windows Client-Side Caching (CSC) Service allows an authorized attacker to elevate privileges locally. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
Missing cryptographic step in Windows Kerberos allows an unauthorized attacker to elevate privileges over a network. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
Improper access control in Customer Experience Improvement Program (CEIP) allows an authorized attacker to elevate privileges locally. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
Improper access control in Microsoft Configuration Manager allows an authorized attacker to elevate privileges locally. Rated medium severity (CVSS 6.7), this vulnerability is low attack complexity. No vendor patch available.
Missing authorization in Nuance PowerScribe allows an unauthorized attacker to disclose information over a network. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
NVIDIA AIStore contains a vulnerability in AuthN. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
NVIDIA AIStore contains a vulnerability in AuthN where an unauthenticated user may cause information disclosure. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Improper access control for some Intel(R) PresentMon before version 2.3.1 within Ring 3: User Applications may allow a denial of service. Rated low severity (CVSS 2.0). No vendor patch available.
Improper access control for some Intel(R) CIP software before version WIN_DCA_2.4.0.11001 within Ring 3: User Applications may allow an information disclosure. Rated medium severity (CVSS 6.8), this vulnerability is low attack complexity. No vendor patch available.
Improper access control for some Intel(R) CIP software before version WIN_DCA_2.4.0.11001 within Ring 3: User Applications may allow an information disclosure. Rated low severity (CVSS 2.1), this vulnerability is remotely exploitable. No vendor patch available.
Improper access control for some SigTest before version 6.1.10 within Ring 3: User Applications may allow an escalation of privilege. Rated medium severity (CVSS 5.4). No vendor patch available.
In JetBrains YouTrack before 2025.3.104432 a race condition allowed bypass of helpdesk Agent limit. Rated low severity (CVSS 2.7), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Same-origin policy bypass in the DOM: Workers component. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Mitigation bypass in the DOM: Security component. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Same-origin policy bypass in the DOM: Notifications component. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Spoofing issue in Firefox. Rated low severity (CVSS 3.4), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
Mitigation bypass in the DOM: Core & HTML component. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Files or Directories Accessible to External Parties, Exposure of Private Personal Information to an Unauthorized Actor vulnerability in Premierturk Information Technologies Inc. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A security issue was discovered within Verve Asset Manager allowing unauthorized read-only users to read, update, and delete users via the API. Rated high severity (CVSS 8.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A security issue exists within DataMosaix™ Private Cloud, allowing attackers to bypass MFA during setup and obtain a valid login-token cookie without knowing the users password. Rated high severity (CVSS 7.6), this vulnerability is no authentication required. No vendor patch available.
Improper Restriction of Excessive Authentication Attempts, Client-Side Enforcement of Server-Side Security, Reliance on Untrusted Inputs in a Security Decision vulnerability in Turkguven Software. Rated high severity (CVSS 7.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Classified Listing - AI-Powered Classified ads & Business Directory Plugin plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The Hydra Booking - Appointment Scheduling & Booking Calendar plugin for WordPress is vulnerable to missing payment verification to unauthenticated payment bypass in all versions up to, and. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Hydra Booking - Appointment Scheduling & Booking Calendar plugin for WordPress is vulnerable to unauthorized booking cancellation in all versions up to, and including, 1.1.27. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An improper access restriction to a folder in Bitdefender Endpoint Security Tools for Mac (BEST) before 7.20.52.200087 allows local users with administrative privileges to bypass the configured. Rated medium severity (CVSS 6.8), this vulnerability is low attack complexity. No vendor patch available.
Quick Facts
- Typical Severity
- CRITICAL
- Category
- auth
- Total CVEs
- 7676