What is CVE-2025-52552?

CVE-2025-52552 is a medium-severity vulnerability in Fastgpt, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-06-21.

How severe is CVE-2025-52552?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Fastgpt

CVE-2025-52552

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 exec…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (14.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Fastgpt
Labring Fastgpt — versions < 4.9.12

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2025-52552?: CVE-2025-52552 is a medium-severity vulnerability in Fastgpt, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-06-21.
How severe is CVE-2025-52552?: Medium severity. CVSS v3 base score is 6.1 out of 10.