CVE-2025-52552: Fastgpt

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

FastGPT is an AI Agent building platform. Prior to version 4.9.12, the LastRoute Parameter on login page is vulnerable to open redirect and DOM-based XSS. Improper validation and lack of sanitization of this parameter allows attackers execute malicious JavaScript or redirect them to attacker-controlled sites. This issue has been patched in version 4.9.12.

Affected products

• Fastgpt Fastgpt: before 4.9.12 (fixed in 4.9.12)

Published 2025-06-21. Last modified 2026-06-17.