CyberRota Analysis
AI-GeneratedFastGPT versions prior to 4.15.0-beta5 are vulnerable due to improper authentication of reverse-call endpoints, allowing unauthenticated attackers to exploit the default INVOKE_TOKEN_SECRET. This vulnerability enables attackers to disclose cross-tenant user PII and upload malicious content to chat files by manipulating JWT tokens. Organizations using affected versions should prioritize upgrading to the latest version to mitigate these risks.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
Note: these links are listed for security research and verification purposes only.
Original NVD Description
FastGPT is a knowledge-based AI application platform. In 4.15.0-beta4, FastGPT plugin invoke reverse-call endpoints under /api/invoke/* authenticate only by verifying a JWT signed with INVOKE_TOKEN_SECRET, which defaults to the constant string token and was not set in official deployment templates. An unauthenticated attacker can self-sign an HS256 JWT and reach /api/invoke/userInfo to disclose cross-tenant user PII by attacker-supplied tmbId values, or /api/invoke/fileUpload to write attacker-controlled content into chat files. This issue is fixed in version 4.15.0-beta5.