CVE-2025-55073CWE-306

CVE-2025-55073

Medium · published November 14, 2025

CVSS v3.1
5.4
EPSS
0%
Percentile
8.8
In the wild
Unconfirmed
What it is

Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11, 10.12.x <= 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00196 · 8.8th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2025-11-14T13:15Z
Affected products (3)
ProductVersionsFixed in
mattermost/mattermost_server≥ 10.5.0, < 10.5.1210.5.12
mattermost/mattermost_server≥ 10.11.0, < 10.11.410.11.4
mattermost/mattermost_server≥ 10.12.0, < 10.12.110.12.1
References (1)
https://mattermost.com/security-updates · [email protected]
EPSS history
Timeline
  • 14 NOV 08:03Z
    MS Teams plugin OAuth allows editing arbitrary posts
    cvelistv5