CVE-2025-3227 — Incorrect Authorization in Mattermost Mattermost-server

CWE-863 — Incorrect Authorization5 documents4 sources
Severity
4.3MEDIUMNVD
EPSS
0.2%
top 61.74%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Github.com Mattermost Mattermost-serverGithub.com Mattermost Mattermost Server V8Mattermost Server+1 more
Timeline
PublishedJun 20
Latest updateJul 28

Description

Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly enforce channel member management permissions in playbook runs, allowing authenticated users without the 'Manage Channel Members' permission to add or remove users from public and private channels by manipulating playbook run participants when the run is linked to a channel.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NExploitability: 2.8 | Impact: 1.4

Affected Packages4 packages

▶NVDmattermost/mattermost_server9.11.0 — 9.11.16+4
▶Gogithub.com/mattermost_mattermost-server9.11.0+incompatible — 9.11.16+incompatible+5
▶CVEListV5mattermost/mattermost10.5.0 — 10.5.5+4

🔴Vulnerability Details

4
OSV
Mattermost allows unauthorized channel member management through playbook runs in github.com/mattermost/mattermost-server↗2025-07-28
▶
CVEList
Unauthorized channel member management through playbook runs↗2025-06-20
▶
OSV
Mattermost allows unauthorized channel member management through playbook runs↗2025-06-20
▶
GHSA
Mattermost allows unauthorized channel member management through playbook runs↗2025-06-20
▶
CVE-2025-3227 — Incorrect Authorization | cvebase