Critical Authentication Bypass and RCE Chain in Apache OFBiz

A sophisticated vulnerability chain has been identified in Apache OFBiz, allowing remote attackers to bypass authentication protocols and achieve full Remote Code Execution (RCE). By exploiting a logic flaw in the password reset workflow and pairing it with an unsandboxed script execution engine, an attacker can compromise a system via a single, well-crafted HTTP POST request. This vulnerability affects all versions of Apache OFBiz prior to 24.09.06.

• CVE ID: CVE-2026-45434
• CVSS 3.1 Score: 8.8 (High)
• Affected Versions: All Apache OFBiz versions before 24.09.06
• Patched Version: Apache OFBiz 24.09.06
• Disclosed: May 20, 2026 | Researcher: Aretiq AI

Technical Analysis: The Exploit Chain

Apache OFBiz is a comprehensive open-source Enterprise Resource Planning (ERP) platform. Security within these environments relies heavily on the integrity of the authentication state. The vulnerability discovered by Aretiq AI researchers demonstrates how three distinct architectural weaknesses can be chained into a catastrophic failure.

The attack leverages a breakdown in how the system handles “forced password change” states, moving from a simple logic error to full system compromise in three distinct phases:

1. Phase 1: Authentication Bypass via LoginWorker.checkLogin()
   The core of the bypass lies in a flawed conditional check. The checkLogin() method is designed to verify if a user has successfully authenticated. However, the implementation only explicitly checks if the return value of the login() function is equal to the string "error". When a user is flagged for a password change, login() returns "requirePasswordChange". Because this string does not equal "error", the method incorrectly evaluates the attempt as a “success,” granting the attacker an authenticated session without a valid credential challenge.
2. Phase 2: Parameter Injection and Session Establishment
   The vulnerability is exacerbated by the fact that the requirePasswordChange flag is not strictly pulled from the secure database record. Instead, the system reads the parameter directly from the HTTP request via request.getParameter("requirePasswordChange"). An attacker can inject requirePasswordChange=Y into their request. By combining this with a password update service call, the attacker can trigger an inline password change and establish a fully authorized session in a single transaction.
3. Phase 3: Unsandboxed RCE via ProgramExport.groovy
   Once authenticated, the attacker targets the ProgramExport.groovy component. In vulnerable versions, this script executes user-supplied Groovy code using a standard GroovyShell. Crucially, it lacks a SecureASTCustomizer, permission checks, or a functional sandbox. This allows the attacker to invoke Runtime.getRuntime().exec(), granting them the ability to execute arbitrary OS commands with the privileges of the OFBiz process user.

In a proof-of-concept test on version 24.09.05, a single POST request to the /webtools/control/ProgramExport endpoint successfully yielded root-level access (uid=0).

Note on Attack Surface: The risk is significantly amplified by the presence of default demo accounts (e.g., admin, flexadmin) that use the well-known default password ofbiz. This makes many staging and production environments trivial targets for automated exploitation.

Remediation and Patch Details

The Apache Software Foundation has addressed this critical chain in version 24.09.06. The fix is not a single patch, but a multi-layered defense-in-depth approach implemented through three specific commits:

• Logic Correction (Commit 6516157): Removed the ability for clients to control the requirePasswordChange parameter via HTTP. All authentication paths that previously returned "requirePasswordChange" now return "error", forcing the system to rely solely on the database-stored user state.
• Access Control (Commit 771efc4): Implemented an ENTITY_MAINT permission requirement within ProgramExport.groovy to ensure only highly privileged users can interact with the script.
• Sandboxing (Commit c0592a3): Introduced a robust Groovy sandbox using SecureASTCustomizer. This includes a strict allowlist for imports (limited to nine specific entity classes) and a regex-based blocklist that prevents the invocation of dangerous classes like ProcessBuilder or Runtime.

Detection and Mitigation Strategies

Network-Based Detection (IDS/IPS)

Security teams should configure Suricata or similar IDS tools to alert on HTTP POST requests directed at /webtools/control/ProgramExport that contain the specific combination of requirePasswordChange=Y and groovyProgram in the body. This pattern is non-standard for legitimate administrative workflows.

Host-Based Detection (YARA)

Perform code-level audits using YARA rules to identify vulnerable files:

• Scan LoginWorker.java for the pattern request.getParameter("requirePasswordChange").
• Scan ProgramExport.groovy to ensure the presence of SecureASTCustomizer and the ENTITY_MAINT check.

Immediate Action Items

• Upgrade: Prioritize upgrading to Apache OFBiz 24.09.06.
• Credential Hygiene: Immediately disable or rotate passwords for all default demo accounts.
• Edge Defense: Implement WAF rules to block or restrict access to the /webtools/control/ProgramExport endpoint from untrusted networks.
• Account Audit: Review all user accounts to ensure the requirePasswordChange flag is being enforced correctly by the updated logic.