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 (37811)
There is a Permission Control Vulnerability in Huawei Smartphone.Successful exploitation of this vulnerability may cause certain codes to be executed. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
There is an Information Disclosure Vulnerability in Huawei Smartphone.Successful exploitation of this vulnerability may lead to authentication bypass. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
An insecure permissions issue was discovered in HMI3 Control Panel in Swisslog Healthcare Nexus operated by released versions of software before Nexus Software 7.2.5.7. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The User Profile Picture WordPress plugin before 2.6.0 was affected by an IDOR issue, allowing users with the upload_image capability (by default author and above) to change and delete the profile. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. Rated high severity (CVSS 7.4), this vulnerability is remotely exploitable, no authentication required. Public exploit code available.
The SendGrid WordPress plugin is vulnerable to authorization bypass via the get_ajax_statistics function found in the ~/lib/class-sendgrid-statistics.php file which allows authenticated users to. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A privileged escalation vulnerability has been identified in Micro Focus ZENworks Configuration Management, affecting version 2020 Update 1 and all prior versions. Rated medium severity (CVSS 6.7), this vulnerability is low attack complexity. No vendor patch available.
Sourcecodester Phone Shop Sales Managements System version 1.0 suffers from a remote SQL injection vulnerability that allows for authentication bypass. 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 was discovered in LemonLDAP::NG before 2.0.12. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.
Dell EMC iDRAC9 versions 4.40.00.00 and later, but prior to 4.40.10.00, contain an improper authentication vulnerability. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Nextcloud Richdocuments in an open source self hosted online office. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
TX9 Automatic Food Dispenser v3.2.57 devices allow access to a shell as root/superuser, a related issue to CVE-2019-16734. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
ArchiSteamFarm is a C# application with primary purpose of idling Steam cards from multiple accounts simultaneously. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable. Public exploit code available.
Common is a package of common modules that can be accessed by NIMBLE services. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity.
DM FingerTool v1.19 in the DM PD065 Secure USB is susceptible to improper authentication by a replay attack, allowing local attackers to bypass user authentication and access all features and data on. Rated high severity (CVSS 7.1), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
IBM i2 Analyst's Notebook Premium (IBM i2 Analyze 4.3.0, 4.3.1, and 4.3.2) could allow an authenticated user to perform unauthorized actions due to hazardous input validation. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity.
Akkadian Provisioning Manager Engine (PME) ships with a hard-coded credential, akkadianuser:haakkadianpassword. 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.
arch/x86/kvm/svm/nested.c in the Linux kernel before 5.11.12 has a use-after-free in which an AMD KVM guest can bypass access control on host OS MSRs when there are nested guests, aka. Rated high severity (CVSS 7.4), this vulnerability is no authentication required. Public exploit code available.
A vulnerability in the CLI interface of Cisco SD-WAN vManage Software could allow an authenticated, local attacker to read arbitrary files on the underlying file system of an affected system. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
A vulnerability in the Multiprotocol Label Switching (MPLS) packet handling function of Cisco SD-WAN Software could allow an unauthenticated, remote attacker to gain access to information stored in. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Multiple vulnerabilities in Cisco Intersight Virtual Appliance could allow an unauthenticated, adjacent attacker to access sensitive internal services from an external interface. Rated high severity (CVSS 8.3), this vulnerability is no authentication required, low attack complexity.
Multiple vulnerabilities in Cisco Intersight Virtual Appliance could allow an unauthenticated, adjacent attacker to access sensitive internal services from an external interface. Rated high severity (CVSS 8.3), this vulnerability is no authentication required, low attack complexity.
A local bypass security restrictions vulnerability was discovered in Aruba CX 6200F Switch Series, Aruba 6300 Switch Series, Aruba 6400 Switch Series, Aruba 8320 Switch Series, Aruba 8325 Switch. Rated medium severity (CVSS 6.2), this vulnerability is low attack complexity.
Collabora Online is a collaborative online office suite. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Vulnerability in the Hyperion Infrastructure Technology product of Oracle Hyperion (component: Lifecycle Management). Rated medium severity (CVSS 5.7), this vulnerability is remotely exploitable. No vendor patch available.
Vulnerability in the Oracle Hyperion BI+ product of Oracle Hyperion (component: UI and Visualization). Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Vulnerability in the Oracle Common Applications product of Oracle E-Business Suite (component: CRM User Management Framework). Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Vulnerability in the Essbase Analytic Provider Services product of Oracle Essbase (component: JAPI). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Vulnerability in the Oracle Web Applications Desktop Integrator product of Oracle E-Business Suite (component: Application Service). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Vulnerability in the PeopleSoft Enterprise CS Campus Community product of Oracle PeopleSoft (component: Integration and Interfaces). Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Vulnerability in the Oracle Time and Labor product of Oracle E-Business Suite (component: Timecard). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Vulnerability in the PeopleSoft Enterprise PT PeopleTools product of Oracle PeopleSoft (component: Notification Configuration). Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Vulnerability in the PeopleSoft Enterprise PeopleTools product of Oracle PeopleSoft (component: Portal). Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Vulnerability in the Oracle Collaborative Planning product of Oracle E-Business Suite (component: User Interface). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Vulnerability in the Oracle Engineering product of Oracle E-Business Suite (component: Change Management). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Vulnerability in the PeopleSoft Enterprise HCM Candidate Gateway product of Oracle PeopleSoft (component: e-mail notification). Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Vulnerability in the Oracle BI Publisher product of Oracle Fusion Middleware (component: E-Business Suite - XDO). Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Vulnerability in the Oracle Advanced Outbound Telephony product of Oracle E-Business Suite (component: Region Mapping). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Vulnerability in the Oracle Hospitality Reporting and Analytics product of Oracle Food and Beverage Applications (component: iCare, Configuration). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Vulnerability in the Oracle E-Records product of Oracle E-Business Suite (component: E-signatures). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Vulnerability in the Primavera P6 Enterprise Project Portfolio Management product of Oracle Construction and Engineering (component: Web Access). Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Vulnerability in the Oracle Applications Framework product of Oracle E-Business Suite (component: Attachments / File Upload). Rated high severity (CVSS 7.6), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Vulnerability in the PeopleSoft Enterprise PeopleTools product of Oracle PeopleSoft (component: SQR). Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Vulnerability in the JD Edwards EnterpriseOne Tools product of Oracle JD Edwards (component: Web Runtime). Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Rated medium severity (CVSS 4.1). No vendor patch available.
Vulnerability in the JD Edwards EnterpriseOne Tools product of Oracle JD Edwards (component: Web Runtime). Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Vulnerability in the Java SE, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Library). Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Vulnerability in the Siebel CRM product of Oracle Siebel CRM (component: Siebel Core - Server Infrastructure). Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
Vulnerability in the Primavera P6 Enterprise Project Portfolio Management product of Oracle Construction and Engineering (component: Web Access). Rated medium severity (CVSS 6.4), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle Human Resources product of Oracle E-Business Suite (component: People Management). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle iSupplier Portal product of Oracle E-Business Suite (component: Accounts). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle Public Sector Financials (International) product of Oracle E-Business Suite (component: Authorization). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle Field Service product of Oracle E-Business Suite (component: Wireless). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle Advanced Inbound Telephony product of Oracle E-Business Suite (component: SDK client integration). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle Approvals Management product of Oracle E-Business Suite (component: AME Page rendering). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle Marketing product of Oracle E-Business Suite (component: Marketing Administration). Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Vulnerability in the Oracle Access Manager product of Oracle Fusion Middleware (component: Rest interfaces for Access Mgr). Rated medium severity (CVSS 4.9), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle Marketing product of Oracle E-Business Suite (component: Marketing Administration). Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Vulnerability in the Siebel Core - Server Framework product of Oracle Siebel CRM (component: Loging). Rated medium severity (CVSS 4.4), this vulnerability is low attack complexity.
Vulnerability in the Hyperion Essbase Administration Services product of Oracle Essbase (component: EAS Console). Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Vulnerability in the Hyperion Essbase Administration Services product of Oracle Essbase (component: EAS Console). Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Vulnerability in the Oracle Commerce Guided Search / Oracle Commerce Experience Manager product of Oracle Commerce (component: Tools and Frameworks). Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Hyperion Infrastructure Technology product of Oracle Hyperion (component: Lifecycle Management). Rated medium severity (CVSS 5.2), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle Commerce Guided Search / Oracle Commerce Experience Manager product of Oracle Commerce (component: Tools and Frameworks). Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle Commerce Guided Search / Oracle Commerce Experience Manager product of Oracle Commerce (component: Tools and Frameworks). Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle Workflow product of Oracle E-Business Suite (component: Workflow Notification Mailer). Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Java SE, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Networking). Rated low severity (CVSS 3.1), this vulnerability is remotely exploitable, no authentication required.
Vulnerability in the Siebel Apps - Marketing product of Oracle Siebel CRM (component: Email Marketing Stand-Alone). Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Vulnerability in the Oracle Database - Enterprise Edition Data Redaction component of Oracle Database Server. Rated low severity (CVSS 3.5), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle Database - Enterprise Edition Data Redaction component of Oracle Database Server. Rated low severity (CVSS 3.5), this vulnerability is remotely exploitable, low attack complexity.
Vulnerability in the Oracle Database - Enterprise Edition Data Redaction component of Oracle Database Server. Rated low severity (CVSS 3.5), this vulnerability is remotely exploitable, low attack complexity.
A CWE-306: Missing Authentication for Critical Function vulnerability exists in C-Bus Toolkit v1.15.8 and prior that could allow an attacker to use a crafted webpage to obtain remote access to the. Rated medium severity (CVSS 5.7), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
A CWE-306: Missing Authentication for Critical Function vulnerability exists in Easergy T200 ((Modbus) SC2-04MOD-07000100 and earlier), Easergy T200 ((IEC104) SC2-04IEC-07000100 and earlier), and. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A CWE-798: Use of Hard-coded Credentials vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions prior to R8 V3.4.0.1), EVlink Parking (EVW2 / EVF2 / EV.2 all versions prior to R8. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A CWE-259: Use of Hard-coded Password vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions prior to R8 V3.4.0.1), EVlink Parking (EVW2 / EVF2 / EV.2 all versions prior to R8. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A CWE-331: Insufficient Entropy vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions prior to R8 V3.4.0.1), EVlink Parking (EVW2 / EVF2 / EV.2 all versions prior to R8 V3.4.0.1),. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A CWE-347: Improper Verification of Cryptographic Signature vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions prior to R8 V3.4.0.1), EVlink Parking (EVW2 / EVF2 / EV.2 all. Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A CWE-798: Use of Hard-coded Credentials vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions prior to R8 V3.4.0.1), EVlink Parking (EVW2 / EVF2 / EV.2 all versions prior to R8. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Vulnerability in the Oracle Commerce Service Center product of Oracle Commerce (component: Commerce Service Center). Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Vulnerability in the Oracle Application Express Data Reporter component of Oracle Database Server. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Vulnerability in the Identity Manager product of Oracle Fusion Middleware (component: Identity Console). Rated high severity (CVSS 7.6), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Vulnerability in the Identity Manager product of Oracle Fusion Middleware (component: Request Management & Workflow). Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Vulnerability in the PeopleSoft Enterprise HCM Shared Components product of Oracle PeopleSoft (component: Person Search). Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Vulnerability in the Oracle Financial Services Crime and Compliance Investigation Hub product of Oracle Financial Services Applications (component: Reports). Rated low severity (CVSS 3.7). No vendor patch available.
Vulnerability in the Oracle XML DB component of Oracle Database Server. Rated medium severity (CVSS 4.9), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Vulnerability in the Database Vault component of Oracle Database Server. Rated low severity (CVSS 2.7), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Vulnerability in the Oracle FLEXCUBE Universal Banking product of Oracle Financial Services Applications (component: Loans And Deposits). Rated medium severity (CVSS 4.6), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Vulnerability in the Oracle FLEXCUBE Universal Banking product of Oracle Financial Services Applications (component: Flex-Branch). Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
HashiCorp Terraform Enterprise releases up to v202106-1 did not properly perform authorization checks on a subset of API requests executed using the run token, allowing privilege escalation to. 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
- 37811