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 (32737)
Vulnerability in the Oracle Banking Trade Finance product of Oracle Financial Services Applications (component: Infrastructure). Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle Banking Trade Finance product of Oracle Financial Services Applications (component: Infrastructure). Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle Banking Trade Finance product of Oracle Financial Services Applications (component: Infrastructure). Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle Banking Trade Finance product of Oracle Financial Services Applications (component: Infrastructure). Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable.
Vulnerability in the Oracle Banking Trade Finance product of Oracle Financial Services Applications (component: Infrastructure). Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Vulnerability in the Oracle FLEXCUBE Universal Banking product of Oracle Financial Services Applications (component: Infrastructure). Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable.
Vulnerability in the Oracle FLEXCUBE Universal Banking product of Oracle Financial Services Applications (component: Infrastructure). Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle Business Intelligence Enterprise Edition product of Oracle Analytics (component: Analytics Web Dashboards). Rated medium severity (CVSS 4.6), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Vulnerability in the Oracle Enterprise Command Center Framework product of Oracle E-Business Suite (component: UI Components). Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Vulnerability in the Oracle Enterprise Command Center Framework product of Oracle E-Business Suite (component: API). Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the BI Publisher product of Oracle Analytics (component: Web Server). Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the MySQL Connectors product of Oracle MySQL (component: Connector/J). Rated high severity (CVSS 8.3), this vulnerability is remotely exploitable, no authentication required.
Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. This Missing Authentication for Critical Function vulnerability could allow attackers to access critical functionality without authentication.
Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). Rated high severity (CVSS 7.9), this vulnerability is low attack complexity.
Vulnerability in the Java VM component of Oracle Database Server. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle iRecruitment product of Oracle E-Business Suite (component: Requisition and Vacancy). Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Vulnerability in the Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Compiler). Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, no authentication required.
Vulnerability in the PeopleSoft Enterprise CC Common Application Objects product of Oracle PeopleSoft (component: Events & Notifications). Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle Communications Order and Service Management product of Oracle Communications Applications (component: User Management). Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Hospitality OPERA 5 Property Services product of Oracle Hospitality Applications (component: Opera). Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. This Missing Authentication for Critical Function vulnerability could allow attackers to access critical functionality without authentication.
Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Exposure of Sensitive Information vulnerability could allow attackers to access sensitive data that should not be disclosed.
Vulnerability in the Oracle Enterprise Session Border Controller product of Oracle Communications (component: Web UI). Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Vulnerability in the Oracle Business Intelligence Enterprise Edition product of Oracle Analytics (component: Pod Admin). Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the PeopleSoft Enterprise PeopleTools product of Oracle PeopleSoft (component: PIA Core Technology). Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Vulnerability in the Oracle Applications Framework product of Oracle E-Business Suite (component: Personalization). Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Vulnerability in the Oracle Notification Server component of Oracle Database Server. Rated medium severity (CVSS 4.3), this vulnerability is no authentication required, low attack complexity.
Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Missing Authentication for Critical Function vulnerability could allow attackers to access critical functionality without authentication.
Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Missing Authentication for Critical Function vulnerability could allow attackers to access critical functionality without authentication.
Vulnerability in the Oracle Java SE, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: CORBA). Rated medium severity (CVSS 5.3), 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.
Vulnerability in the Oracle Commerce Guided Search product of Oracle Commerce (component: Workbench). Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition, product of Oracle Java SE (component: Hotspot). Rated low severity (CVSS 3.7), this vulnerability is remotely exploitable, no authentication required.
Vulnerability in the Oracle HTTP Server product of Oracle Fusion Middleware (component: Web Listener). Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Exposure of Sensitive Information vulnerability could allow attackers to access sensitive data that should not be disclosed.
Eaton easySoft software is used to program easy controllers and displays for configuring, programming and defining parameters for all the intelligent relays. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Eaton easyE4 PLC offers a device password protection functionality to facilitate a secure connection and prevent unauthorized access. Rated medium severity (CVSS 6.6), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Grafana is an open-source platform for monitoring and observability. Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Nextcloud talk is a chat module for the Nextcloud server platform. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity.
An Access Control issue discovered in Extreme Networks Switch Engine (EXOS) before 32.5.1.5, also fixed in 22.7, 31.7.2 allows attackers to gain escalated privileges using crafted telnet commands via. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
In Terminalfour before 8.3.16, misconfigured LDAP users are able to login with an invalid password. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. This Incorrect Authorization vulnerability could allow attackers to bypass authorization checks to access restricted resources.
WebAuthn4J Spring Security provides Web Authentication specification support for Spring applications. Rated medium severity (CVSS 5.3), 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.
A session fixation vulnerability in South River Technologies' Titan MFT and Titan SFTP servers on Linux and Windows allows an attacker to bypass the server's authentication if they can trick an. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Authorization Bypass Through User-Controlled Key vulnerability in Apache InLong.4.0 through 1.8.0, some sensitive params checks will be bypassed, like "autoDeserizalize","allowLoadLocalInfile".... Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
IBM Security Verify Governance 10.0 contains hard-coded credentials, such as a password or cryptographic key, which it uses for its own inbound authentication, outbound communication to external. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Use of Hard-coded Credentials vulnerability could allow attackers to gain access using credentials embedded in source code.
A insufficient session expiration in Fortinet FortiEDR version 5.0.0 through 5.0.1 allows attacker to execute unauthorized code or commands via api request. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required.
An indirect object reference (IDOR) in GRANDING UTime Master v9.0.7-Build:Apr 4,2023 allows authenticated attackers to access sensitive information via a crafted cookie. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
Improper access control in PAM propagation scripts in Devolutions Server 2023.2.8.0 and ealier allows an attack with permission to manage PAM propagation scripts to retrieve passwords stored in it. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Dell OpenManage Server Administrator, versions 11.0.0.0 and prior, contains an Improper Access Control vulnerability. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
Adobe Commerce versions 2.4.7-beta1 (and earlier), 2.4.6-p2 (and earlier), 2.4.5-p4 (and earlier) and 2.4.4-p5 (and earlier) are affected by an Improper Authorization vulnerability that could lead in. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Adobe Commerce versions 2.4.7-beta1 (and earlier), 2.4.6-p2 (and earlier), 2.4.5-p4 (and earlier) and 2.4.4-p5 (and earlier) are affected by an Incorrect Authorization . Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Improper Authentication vulnerability in Mitsubishi Electric Corporation MELSEC-F Series main modules allows a remote unauthenticated attacker to obtain sequence programs from the product or write. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in the NetworkStack agent daemon (nsagentd) of Juniper Networks Junos OS Evolved allows an unauthenticated network. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in /fcgi/scrut_fcgi.fcgi in Plixer Scrutinizer before 19.3.1. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
BeyondTrust Privileged Remote Access (PRA) versions 22.2.x to 22.4.x are vulnerable to a local authentication bypass. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
An authentication bypass vulnerability exists in the CiRpcServerThread() functionality of SoftEther VPN 5.01.9674 and 4.41-9782-beta. Rated high severity (CVSS 7.4), this vulnerability is no authentication required. Public exploit code available.
An authentication bypass vulnerability exists in the CiRpcAccepted() functionality of SoftEther VPN 4.41-9782-beta and 5.01.9674. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. Public exploit code available.
There is an interface unauthorized access vulnerability in the background of Tencent Enterprise Wechat Privatization 2.5.x and 2.6.930000. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Inappropriate implementation in Fullscreen in Google Chrome prior to 118.0.5993.70 allowed an attacker who convinced a user to install a malicious extension to bypass navigation restrictions via a. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Inappropriate implementation in Intents in Google Chrome prior to 118.0.5993.70 allowed a remote attacker to bypass content security policy via a crafted HTML page. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Inappropriate implementation in Extensions API in Google Chrome prior to 118.0.5993.70 allowed an attacker who convinced a user to install a malicious extension to bypass an enterprise policy via a. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Inappropriate implementation in Installer in Google Chrome prior to 118.0.5993.70 allowed a local attacker to bypass discretionary access control via a crafted command. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Inappropriate implementation in DevTools in Google Chrome prior to 118.0.5993.70 allowed an attacker who convinced a user to install a malicious extension to bypass discretionary access control via a. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An Origin Validation vulnerability in MAC address validation of Juniper Networks Junos OS Evolved on PTX10001, PTX10004, PTX10008, and PTX10016 devices allows a network-adjacent attacker to bypass. Rated medium severity (CVSS 5.4), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
An Origin Validation vulnerability in MAC address validation of Juniper Networks Junos OS Evolved on PTX10003 Series allows a network-adjacent attacker to bypass MAC address checking, allowing MAC. Rated medium severity (CVSS 5.4), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
NAXSI is an open-source maintenance web application firewall (WAF) for NGINX. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
An Exposure of Sensitive Information vulnerability in the 'file copy' command of Junos OS Evolved allows a local, authenticated attacker with shell access to view passwords supplied on the CLI. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
vantage6 is privacy preserving federated learning infrastructure. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity.
In TBD of TBD, there is a possible way to access location information due to a permissions bypass. Rated medium severity (CVSS 4.4), this vulnerability is low attack complexity. No vendor patch available.
vantage6 is privacy preserving federated learning infrastructure. 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.
A leftover debug code vulnerability exists in the httpd debug credentials functionality of Yifan YF325 v1.0_20221108. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A command execution vulnerability exists in the validate.so diag_ping_start functionality of Yifan YF325 v1.0_20221108. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An authentication bypass vulnerability exists in the httpd nvram.cgi functionality of Yifan YF325 v1.0_20221108. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A vulnerability of authentication bypass has been found on a Zebra Technologies ZTC ZT410-203dpi ZPL printer. Rated medium severity (CVSS 4.3), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
An Insecure Direct Object Reference (IDOR) vulnerability leads to events profiles access in Elenos ETG150 FM transmitter running on version 3.12. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Vulnerability of undefined permissions in the MeeTime module.Successful exploitation of this vulnerability will affect availability and confidentiality. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Vulnerability of access permissions not being strictly verified in the APPWidget module.Successful exploitation of this vulnerability may cause some apps to run without being authorized. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Incorrect Authorization in GitHub repository tiann/kernelsu prior to v0.6.9. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
Authorization Bypass Through User-Controlled Key vulnerability in Apache ZooKeeper. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Vulnerability of brute-force attacks on the device authentication module.Successful exploitation of this vulnerability may affect service confidentiality. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Use of default credentials vulnerability in MR-GM2 firmware Ver. Rated medium severity (CVSS 4.3), this vulnerability is no authentication required, low attack complexity. This Use of Hard-coded Credentials vulnerability could allow attackers to gain access using credentials embedded in source code.
e-Gov Client Application (Windows version) versions prior to 2.1.1.0 and e-Gov Client Application (macOS version) versions prior to 1.1.1.0 are vulnerable to improper authorization in handler for. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Win32k Elevation of Privilege Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
Windows RDP Encoder Mirror Driver Elevation of Privilege Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
Windows Kernel Elevation of Privilege Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
Windows Power Management Service Information Disclosure Vulnerability. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This Improper Authentication vulnerability could allow attackers to bypass authentication mechanisms to gain unauthorized access.
Active Directory Domain Services Information Disclosure Vulnerability. Rated medium severity (CVSS 4.4), this vulnerability is remotely exploitable.
Windows Kernel Security Feature Bypass Vulnerability. Rated medium severity (CVSS 4.4), this vulnerability is low attack complexity.
Windows Mark of the Web Security Feature Bypass Vulnerability. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Windows Search Security Feature Bypass Vulnerability. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Azure DevOps Server Elevation of Privilege Vulnerability. Rated high severity (CVSS 7.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
An authorization bypass through user-controlled key [CWE-639] vulnerability in Fortinet FortiManager version 7.4.0 and before 7.2.3 and FortiAnalyzer version 7.4.0 and before 7.2.3 allows a remote. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Quick Facts
- Typical Severity
- CRITICAL
- Category
- auth
- Total CVEs
- 32737