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 (7728)
Missing authorization vulnerability in TCMAN's GIM v11. Rated high severity (CVSS 8.7), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing authentication vulnerability in TCMAN GIM v11. 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) vulnerability in Clickedu. Rated high severity (CVSS 8.7), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A vulnerability has been found in Summer Pearl Group Vacation Rental Management Platform up to 1.0.1 and classified as critical. 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 classified as critical has been found in Realce Tecnologia Queue Ticket Kiosk up to 20250517. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An unauthenticated remote attacker can access a URL which causes the device to reboot. 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 access information about running processes via the SNMP protocol. Rated high severity (CVSS 8.2), 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 llisoft MTA Maita Training System 4.5.fileService.download of the file com\llisoft\controller\OpenController.java. 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 H3C SecCenter SMP-E1114P02 up to 20250513. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability was found in WCMS up to 8.3.11. Rated medium severity (CVSS 6.3), this vulnerability is remotely exploitable, no authentication required. Public exploit code available and no vendor patch available.
A vulnerability was found in Tmall Demo up to 20250505. Rated medium severity (CVSS 5.1), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
A vulnerability was found in Tmall Demo up to 20250505. Rated medium severity (CVSS 5.1), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
In Tenable Network Monitor versions prior to 6.5.1 on a Windows host, it was found that a non-administrative user could stage files in a local directory to run arbitrary code with SYSTEM privileges,. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
When installing Tenable Network Monitor to a non-default location on a Windows host, Tenable Network Monitor versions prior to 6.5.1 did not enforce secure permissions for sub-directories. Rated high severity (CVSS 7.0). No vendor patch available.
An access control vulnerability was discovered in Grafana OSS where an Organization administrator could permanently delete the Server administrator account. Rated medium severity (CVSS 5.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability was found in zongzhige ShopXO 6.5.0. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in dastan800 Visual Header allows Exploiting Incorrectly Configured Access Control Security Levels.3. 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 Leadinfo Leadinfo allows Exploiting Incorrectly Configured Access Control Security Levels.1. 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 smackcoders Lead Form Data Collection to CRM allows Privilege Escalation.1. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in 6Storage 6Storage Rentals allows Path Traversal.19.4. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in PT Norther Lights Production MapSVG allows Accessing Functionality Not Properly Constrained by ACLs.6.13. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in UX Design Experts Experto CTA Widget – Call To Action, Sticky CTA, Floating Button Plugin allows Exploiting Incorrectly Configured Access Control Security. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Authentication Bypass Using an Alternate Path or Channel vulnerability in mediaticus Subaccounts for WooCommerce allows Authentication Abuse.6.6. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in dastan800 Visual Builder allows Reflected XSS.2.2. Rated high severity (CVSS 7.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Iridium Certus 700 version 1.0.1 has an embedded credentials vulnerability in the code. Rated medium severity (CVSS 6.1), this vulnerability is low attack complexity. No vendor patch available.
Missing Authorization vulnerability in Chimpstudio JobHunt Job Alerts allows Exploiting Incorrectly Configured Access Control Security Levels.6. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Ecovacs Home Android and iOS Mobile Applications up to version 3.3.0 contained embedded access keys and secrets for Alibaba Object Storage Service (OSS), leading to sensitive data disclosure. Rated medium severity (CVSS 4.7), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
OpenFGA is an authorization/permission engine. Rated medium severity (CVSS 5.8), this vulnerability is remotely exploitable, low attack complexity.
When a notification relating to low battery appears for a user with whom the device has been shared, tapping the notification grants full access to the power settings of that device. Rated medium severity (CVSS 4.8), this vulnerability is low attack complexity. No vendor patch available.
Schule is open-source school management system software. Rated medium severity (CVSS 6.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Incorrect Authorization vulnerability could allow attackers to bypass authorization checks to access restricted resources.
An improper authentication vulnerability exists in WSO2 Identity Server 7.0.0 due to an implementation flaw that allows app-native authentication to be bypassed when an invalid object is passed. Rated medium severity (CVSS 5.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An incorrect authorization vulnerability exists in multiple WSO2 products due to a business logic flaw in the account recovery-related SOAP admin service. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue in Ocuco Innovation - REPORTS.EXE v2.10.24.13 allows attackers to bypass authentication and escalate privileges to Administrator via a crafted TCP packet. 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.
An issue in Ocuco Innovation - INVCLIENT.EXE v2.10.24.5 allows attackers to bypass authentication and escalate privileges to Administrator via a crafted TCP packet. 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.
An issue in Ocuco Innovation - REPORTSERVER.EXE v2.10.24.13 allows attackers to bypass authentication and escalate privileges to Administrator via a crafted TCP packet. 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.
An issue in Ocuco Innovation - INNOVASERVICEINTF.EXE v2.10.24.17 allows attackers to bypass authentication and escalate privileges to Administrator via a crafted TCP packet. 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.
SSL Verification Bypass vulnerabilities exist in ASPECT if administrator credentials become compromised*; NEXUS Series: through 3.*; MATRIX Series: through 3.*. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Device commissioning parameters in ASPECT may be modified by an external source if administrative credentials become compromised*; NEXUS Series: through 3.*; MATRIX Series: through 3.*. Rated high severity (CVSS 7.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
System File Deletion vulnerabilities in ASPECT provide attackers access to delete system files if session administrator credentials become compromised.08.03; NEXUS Series: through 3.08.03; MATRIX. Rated high severity (CVSS 7.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A request smuggling vulnerability identified within Pingora’s proxying framework, pingora-proxy, allows malicious HTTP requests to be injected via manipulated request bodies on cache HITs, leading to. Rated high severity (CVSS 7.4), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
When pglogical attempts to replicate data, it does not verify it is using a replication connection, which means a user with CONNECT access to a database configured for replication can execute the. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable. No vendor patch available.
An issue was discovered in Infoblox NETMRI before 7.6.1. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required. Epss exploitation probability 33.5% and no vendor patch available.
An issue has been discovered in GitLab CE/EE affecting all versions from 16.8 before 17.10.7, 17.11 before 17.11.3, and 18.0 before 18.0.1. Rated medium severity (CVSS 4.6), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An issue has been discovered in GitLab CE/EE affecting all versions from 11.1 before 17.10.7, 17.11 before 17.11.3, and 18.0 before 18.0.1. Rated medium severity (CVSS 6.8), this vulnerability is remotely exploitable. Public exploit code available and no vendor patch available.
A vulnerability classified as critical has been found in Campcodes Online Shopping Portal 1.0. Rated medium severity (CVSS 5.1), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
The Open edX Platform is a learning management platform. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The Versa Concerto SD-WAN orchestration platform is vulnerable to an authentication bypass in the Traefik reverse proxy configuration, allowing at attacker to access administrative endpoints. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Versa Concerto SD-WAN orchestration platform contains an authentication bypass in Traefik reverse proxy configuration, exposing Actuator endpoints with heap dumps and trace logs.
Affected Vertiv products do not properly protect webserver functions that could allow an attacker to bypass authentication. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The embedded web server lacks authentication and access controls, allowing unrestricted remote access. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue in D-Link DI-8100 16.07.26A1 allows a remote attacker to bypass administrator login authentication. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
XWiki is a generic wiki platform. Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.
OsamaTaher/Java-springboot-codebase is a collection of Java and Spring Boot code snippets, applications, and projects. Rated high severity (CVSS 7.7), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Authentication Bypass by Capture-replay vulnerability in Drupal One Time Password allows Remote Services with Stolen Credentials.0.0 before 1.3.0. Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal One Time Password allows Functionality Bypass.0.0 before 1.3.0. Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, no authentication required. Public exploit code available and no vendor patch available.
Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal One Time Password allows Functionality Bypass.0.0 before 1.3.0. Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
Missing Authorization vulnerability in Drupal Single Content Sync allows Functionality Misuse.0.0 before 1.4.12. Rated low severity (CVSS 3.1), this vulnerability is remotely exploitable. No vendor patch available.
A vulnerability in an API subsystem of Cisco Secure Network Analytics Manager and Cisco Secure Network Analytics Virtual Manager could allow an authenticated, remote attacker with low privileges to. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability in the Cloud Connect component of Cisco Unified Contact Center Enterprise (CCE) could allow an unauthenticated, remote attacker to read and modify data on an affected device. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A vulnerability in the API of Cisco Unified Intelligence Center could allow an authenticated, remote attacker to perform a horizontal privilege escalation attack on an affected system. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An OpenSSH daemon listens on TCP port 22. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
A low-privileged user can access information about profiles created in Proget MDM (Mobile Device Management), which contain details about allowed/prohibited functions. Rated medium severity (CVSS 5.1), this vulnerability is low attack complexity. No vendor patch available.
In Proget MDM, a low-privileged user can access information about changes contained in backups of all devices managed by the MDM (Mobile Device Management). Rated medium severity (CVSS 4.6), this vulnerability is low attack complexity. No vendor patch available.
In Proget MDM, a low-privileged user can retrieve passwords for managed devices and subsequently use functionalities restricted by the MDM (Mobile Device Management). Rated high severity (CVSS 7.0), this vulnerability is low attack complexity. No vendor patch available.
The Splitit plugin for WordPress is vulnerable to unauthorized modification of data due to missing capability checks on several functions in the 'splitIt-flexfields-payment-gateway.php' file in all. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
There are several scripts in the web interface that are accessible via undocumented hard-coded credentials. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The `/etc/passwd` and `/etc/shadow` files reveal hard-coded password hashes for the operating system "root" user. Rated high severity (CVSS 7.7), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Spring Security Aspects may not correctly locate method security annotations on private methods. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The devices do not implement any authentication for the web interface or the MQTT server. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
A low-privileged user is able to obtain information about tasks executed on devices controlled by Proget MDM (Mobile Device Management), as well as details of the devices like their UUIDs needed for. Rated medium severity (CVSS 5.1), this vulnerability is low attack complexity. No vendor patch available.
In JetBrains YouTrack before 2025.1.76253 deletion of issues was possible due to missing permission checks in API. Rated high severity (CVSS 7.7), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
In JetBrains YouTrack before 2025.1.74704 restricted attachments could become visible after issue cloning. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
This High severity PrivEsc (Privilege Escalation) vulnerability was introduced in versions: 9.12.0, 10.3.0, 10.4.0, and 10.5.0 of Jira Core Data Center and Server 5.12.0, 10.3.0, 10.4.0, and 10.5.0. Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, low attack complexity.
Password guessing limits could be bypassed when using LDAP authentication. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
IBM Security ReaQta EDR 3.12 could allow an attacker to perform unauthorized actions due to improper SSL certificate validation. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
TYPO3 is an open source, PHP based web content management system. Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
TYPO3 is an open source, PHP based web content management system. Rated low severity (CVSS 3.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
TYPO3 is an open source, PHP based web content management system. Rated low severity (CVSS 3.7), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
A vulnerability, which was classified as very critical, was found in Netgear DGND3700 1.1.00.15_1.00.15NA. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
VMware Cloud Foundation contains a missing authorisation vulnerability. Rated high severity (CVSS 7.3), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in ThemeGoods Grand Restaurant WordPress allows Exploiting Incorrectly Configured Access Control Security Levels.0. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in Rocket Apps wProject.8.0. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in ChoPlugins Custom PC Builder Lite for WooCommerce allows Exploiting Incorrectly Configured Access Control Security Levels.0.1. 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 Crocoblock JetBlocks For Elementor allows Accessing Functionality Not Properly Constrained by ACLs.3.16. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in Crocoblock JetWooBuilder allows Accessing Functionality Not Properly Constrained by ACLs.1.18. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in Crocoblock JetElements For Elementor allows Accessing Functionality Not Properly Constrained by ACLs.7.4.1. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in ThimPress Eduma allows Exploiting Incorrectly Configured Access Control Security Levels.6.4. 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 Jeroen Peters Name Directory.30.0. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in Averta Master Slider.10.8. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Missing Authorization vulnerability in Themovation Hotel + Bed and Breakfast Booking Calendar Theme | Bellevue.2.2. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Quick Facts
- Typical Severity
- CRITICAL
- Category
- auth
- Total CVEs
- 7728