CVE-2025-24839 — Incorrect Authorization in Mattermost Mattermost-server

CWE-863 — Incorrect Authorization5 documents4 sources
Severity
4.3MEDIUMNVD
CNA3.1
EPSS
0.2%
top 64.10%
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
PublishedApr 16
Latest updateApr 22

Description

Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to prevent Wrangler posts from triggering AI responses. This vulnerability allows users without access to the AI bot to activate it by attaching the activate_ai override property to a post via the Wrangler plugin, provided both the AI and Wrangler plugins are enabled.

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 — 9.11.10+2
▶Gogithub.com/mattermost_mattermost-server9.11.0+incompatible — 9.11.10+incompatible+2
▶CVEListV5mattermost/mattermost10.5.0 — 10.5.1+2

🔴Vulnerability Details

4
OSV
Mattermost Incorrect Authorization vulnerability in github.com/mattermost/mattermost-server↗2025-04-22
▶
GHSA
Mattermost Incorrect Authorization vulnerability↗2025-04-16
▶
OSV
Mattermost Incorrect Authorization vulnerability↗2025-04-16
▶
CVEList
Unauthorized AI bot activation via Wrangler plugin↗2025-04-16
▶
CVE-2025-24839 — Incorrect Authorization | cvebase