CVE-2025-13352CWE-1287

CVE-2025-13352

Low · published December 17, 2025

CVSS v3.1
3.0
EPSS
0%
Percentile
6.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.0 · LOW
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00175 · 6.6th percentile
Weakness
CWE-1287 · Improper Validation of Specified Type of Input
Published
2025-12-17T18:15Z
Affected products (1)
ProductVersionsFixed in
mattermost/mattermost_server≥ 10.11.0, < 10.11.710.11.7
References (1)
https://mattermost.com/security-updates · [email protected]
EPSS history
Timeline
  • 17 DEC 12:11Z
    Mattermost GitHub Plugin allows unauthorized GitHub reactions via reaction forwarding hijacking
    cvelistv5