What is CVE-2025-13352?

CVE-2025-13352 is a low-severity vulnerability in Mattermost, classified under CWE-1287. CVSS score: 3.0/10. Published 2025-12-17.

How severe is CVE-2025-13352?

Low severity. CVSS v3 base score is 3.0 out of 10.

Vulnerability in Mattermost

CVE-2025-13352

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: 0.001 (4.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.0 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:N.

Affected products

Mattermost — versions 10.11.0, 11.1.0, 10.11.7
Mattermost Mattermost_server

Weakness classification (CWE)

CWE-1287

References

responsibledisclosure@mattermost.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-13352?: CVE-2025-13352 is a low-severity vulnerability in Mattermost, classified under CWE-1287. CVSS score: 3.0/10. Published 2025-12-17.
How severe is CVE-2025-13352?: Low severity. CVSS v3 base score is 3.0 out of 10.