What is the CVSS score of CVE-2025-52552?

CVE-2025-52552 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.1%.

Which versions of Open Redirect are affected by CVE-2025-52552?

Organizations using FastGPT should be aware of moderate risk from CVE-2025-52552, a cross-site scripting vulnerability rated CVSS 6.1.. A patch is available.

Is there a public PoC exploit available for CVE-2025-52552?

Yes, a public proof-of-concept exploit is available for CVE-2025-52552. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-52552?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Open Redirect CVE-2025-52552

EUVD-2025-18916 MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2025-06-21 security-advisories@github.com

XSS Open Redirect Fastgpt

6.1

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

EUVD ID Assigned

Mar 15, 2026 - 21:35 euvd

EUVD-2025-18916

Analysis Generated

Mar 15, 2026 - 21:35 vuln.today

Patch released

Mar 15, 2026 - 21:35 nvd

Patch available

PoC Detected

Dec 29, 2025 - 19:06 vuln.today

Public exploit code

CVE Published

Jun 21, 2025 - 03:15 nvd

MEDIUM 6.1

DescriptionGitHub Advisory

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.

Analysis

Technical ContextAI

Cross-site scripting (XSS) allows injection of client-side scripts into web pages viewed by other users due to insufficient output encoding.

RemediationAI

A vendor patch is available — apply it immediately. Encode all user-supplied output contextually (HTML, JS, URL). Implement Content Security Policy (CSP) headers. Use HTTPOnly and Secure cookie flags.

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