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CVE-2025-52552— FastGPT LastRoute Parameter on Login Page Vulnerable to Open Redirect and DOM-based XSS

Quick assessment

Affected
labring FastGPT
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FastGPT是labring开源的一款基于大语言模型的开源知识库问答系统。 FastGPT 4.9.12之前版本存在输入验证错误漏洞，该漏洞源于LastRoute参数验证不足，可能导致开放重定向和DOM型跨站脚本攻击。

AI Predicted 6.1 Difficulty: Easy EPSS 0.27% · P17
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I. Basic Information for CVE-2025-52552

Vulnerability Information
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Vulnerability Title
FastGPT LastRoute Parameter on Login Page Vulnerable to Open Redirect and DOM-based XSS
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
FastGPT 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FastGPT是labring开源的一款基于大语言模型的开源知识库问答系统。 FastGPT 4.9.12之前版本存在输入验证错误漏洞，该漏洞源于LastRoute参数验证不足，可能导致开放重定向和DOM型跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
labring FastGPT < 4.9.12 -

II. Public POCs for CVE-2025-52552

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III. Intelligence Information for CVE-2025-52552

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Patches & Fixes for CVE-2025-52552 (1)

Vendor Advisories for CVE-2025-52552 (1)

IV. Related Vulnerabilities

Same product: FastGPT
Same vendor: labring
Same weakness: CWE-601

V. Comments for CVE-2025-52552

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