CVE-2025-52186

Name: CVE-2025-52186
Creator: NVD / NIST
Published: 2025-11-13T16:15:51.433+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.28%

Last modified Jun 17, 2026

CVE-2025-52186 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Lichess lila before commit 11b4c0fb00f0ffd823246f839627005459c8f05c (2025-06-02) contains a Server-Side Request Forgery (SSRF) vulnerability in the game export API. The players parameter is passed directly to an internal HTTP client without validation, allowing remote attackers to force the server to send HTTP requests to arbitrary URLs. EPSS estimates a 0.28% chance of exploitation in the next 30 days.

Description

Lichess lila before commit 11b4c0fb00f0ffd823246f839627005459c8f05c (2025-06-02) contains a Server-Side Request Forgery (SSRF) vulnerability in the game export API. The players parameter is passed directly to an internal HTTP client without validation, allowing remote attackers to force the server to send HTTP requests to arbitrary URLs

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.28%

19.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-918

Affected Software

Vendor	Product	Versions
Lichess	Lila	< 2025-06-02

References

https://github.com/lichess-org/lila/commit/11b4c0fb00f0ffd8232346f839627005459c8f05cBroken Link
https://hackerone.com/reports/3165242Exploit, Issue Tracking

Timeline

Published: Nov 13, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-52186?

How severe is CVE-2025-52186?

CVE-2025-52186 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.

How do I fix CVE-2025-52186?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-52186?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST