CVE-2025-27936CWE-208

Webhook Secret Exposure via Timing attack in MSteams plugin

Medium · published April 16, 2025

CVSS v3.1
5.3
EPSS
0%
Percentile
26.8
In the wild
Unconfirmed
What it is

Mattermost Plugin MSTeams versions <2.1.0 and Mattermost Server versions 10.5.x <=10.5.1 with the MS Teams plugin enabled fail to perform constant time comparison on a MSTeams plugin webhook secret which allows an attacker to retrieve the webhook secret of the MSTeams plugin via a timing attack during webhook secret comparison.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00345 · 26.8th percentile
Weakness
CWE-208 · Observable Timing Discrepancy
Published
2025-04-16T09:14Z
EPSS history
Timeline
  • 16 APR 09:14Z
    Webhook Secret Exposure via Timing attack in MSteams plugin
    cvelistv5