CVE-2025-4643 in Payload
Summary
by MITRE • 08/29/2025
Payload uses JSON Web Tokens (JWT) for authentication. After log out JWT is not invalidated, which allows an attacker who has stolen or intercepted token to freely reuse it until expiration date (which is by default set to 2 hours, but can be changed).
This issue has been fixed in version 3.44.0 of Payload.
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Analysis
by VulDB Data Team • 08/29/2025
This vulnerability represents a critical session management flaw in the Payload content management system where JSON Web Tokens serve as the primary authentication mechanism. The issue stems from improper token invalidation following user logout events, creating a persistent security weakness that allows attackers to maintain unauthorized access to protected resources. When users log out of the system, the JWT tokens remain valid in the token store, enabling attackers who have intercepted or stolen these tokens to continue using them until their natural expiration time elapses. This behavior fundamentally undermines the security model of the application, as it violates the principle of least privilege and allows for extended unauthorized access periods beyond the intended session boundaries. The default expiration time of two hours provides attackers with an extended window of opportunity to exploit stolen credentials, making this vulnerability particularly dangerous in environments where token interception is possible through network sniffing or other attack vectors.
The technical implementation flaw manifests in the application's session management logic where the logout process fails to properly invalidate or remove JWT tokens from the system's token registry. This creates a state inconsistency where the application's internal session tracking system becomes decoupled from the token validation mechanism, allowing tokens to remain active even when users believe they have been properly logged out. From a cybersecurity perspective, this vulnerability directly relates to CWE-613, which addresses insufficient session expiration, and CWE-306, which covers missing authentication checks. The issue also aligns with ATT&CK technique T1566, specifically focusing on credential access through stolen tokens, and T1567, which addresses credential dumping and token reuse attacks. The persistence of these tokens in the system creates a false sense of security for legitimate users while simultaneously providing attackers with extended access windows.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it enables attackers to perform privileged actions within the application using stolen credentials. This includes data manipulation, content creation, user account modifications, and potentially lateral movement within the application's access controls. The two-hour default expiration period provides attackers with sufficient time to conduct reconnaissance, establish persistence, and execute more sophisticated attacks without immediate detection. Organizations relying on Payload for content management or administrative functions face significant risk of data breaches, content tampering, and unauthorized modifications to critical systems. The vulnerability is particularly concerning in multi-user environments where stolen tokens could be used to impersonate legitimate administrators or content creators, potentially leading to complete system compromise.
The mitigation strategy for this vulnerability requires immediate implementation of proper token invalidation mechanisms upon user logout events. The fix implemented in Payload version 3.44.0 addresses this by ensuring that JWT tokens are properly removed from the system's token store during logout operations, preventing their reuse by unauthorized parties. Organizations should also consider implementing additional security measures such as shortening token expiration times, implementing refresh token mechanisms with proper invalidation, and adding token revocation endpoints. Security teams should monitor for potential exploitation attempts through token analysis and implement logging of authentication events to detect unauthorized token usage. The vulnerability highlights the importance of proper session management in web applications and reinforces the need for comprehensive security testing of authentication mechanisms, particularly those involving token-based authentication systems.