CVE-2025-13352EPSS p6.5%

CVE-2025-13352CVE-2025-13352

mattermost / mattermost_server

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.

Scoring

CVSS 3.0 ()
VectorCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:N
EPSS0.18% probability of exploitation · percentile 6.5% · 2026-10-17T12:00:28Z
Last modified2026-10-13
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.