CVE-2025-13352

Name: CVE-2025-13352
Creator: NVD / NIST
Published: 2025-12-17T13:15:56.627+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3/10EPSS 0.14%

Last modified Jun 17, 2026

CVE-2025-13352 is a low-severity vulnerability rated 3/10 on the CVSS scale. Mattermost versions 10.11.x <= 10.11.6 and Mattermost GitHub plugin versions <=2.4.0 fail to validate plugin bot identity in reaction forwarding which allows attackers to hijack the GitHub reaction feature to make users add reactions to arbitrary GitHub objects via crafted notification posts.. EPSS estimates a 0.14% chance of exploitation in the next 30 days.

Description

Mattermost versions 10.11.x <= 10.11.6 and Mattermost GitHub plugin versions <=2.4.0 fail to validate plugin bot identity in reaction forwarding which allows attackers to hijack the GitHub reaction feature to make users add reactions to arbitrary GitHub objects via crafted notification posts.

Metrics

CVSS 3.1

3/10

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

EPSS Probability

0.14%

4.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1287

Affected Software

Vendor	Product	Versions
Mattermost	Mattermost Server	>= 10.11.0, < 10.11.7

References

https://mattermost.com/security-updatesVendor Advisory

Timeline

Published: Dec 17, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-13352?

How severe is CVE-2025-13352?

CVE-2025-13352 has a CVSS score of 3/10 (LOW severity). The EPSS model estimates a 0.14% probability of exploitation in the next 30 days.

How do I fix CVE-2025-13352?

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-2025-13352?

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

Scan your code now

Source: NVD / NIST