CVE-2025-52552 PUBLISHED

FastGPT LastRoute Parameter on Login Page Vulnerable to Open Redirect and DOM-based XSS

Assigner: GitHub_M
Reserved: 18.06.2025 Published: 21.06.2025 Updated: 21.06.2025

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
CVSS Score: 5.5

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	High
Attack Complexity	Low	Integrity	None	Integrity	High
Attack Requirements	Present	Availability	None	Availability	High
Privileges Required	None
User Interaction	Active

CVSS 4.0

Product Status

Vendor	labring
Product	FastGPT
Versions	Version < 4.9.12 is affected

References

Problem Types

CWE-601: URL Redirection to Untrusted Site ('Open Redirect') CWE
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE