CVE-2025-27715 — Incorrect Authorization in Mattermost Mattermost-server

CWE-863 — Incorrect Authorization5 documents4 sources
Severity
2.7LOWNVD
CNA3.3
EPSS
0.1%
top 75.35%
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
PublishedMar 21
Latest updateMar 25

Description

Mattermost versions 9.11.x <= 9.11.8 fail to prompt for explicit approval before adding a team admin to a private channel, which team admins to joining private channels via crafted permalink links without explicit consent from them.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:NExploitability: 1.2 | Impact: 1.4

Affected Packages4 packages

▶NVDmattermost/mattermost_server9.11.0 — 9.11.9
▶Gogithub.com/mattermost_mattermost-server9.11.0+incompatible — 9.11.9+incompatible
▶CVEListV5mattermost/mattermost9.11.0 — 9.11.8

🔴Vulnerability Details

4
OSV
Mattermost fail to prompt for explicit approval before adding a team admin to a private channel in github.com/mattermost/mattermost-server↗2025-03-25
▶
OSV
Mattermost fail to prompt for explicit approval before adding a team admin to a private channel↗2025-03-21
▶
GHSA
Mattermost fail to prompt for explicit approval before adding a team admin to a private channel↗2025-03-21
▶
CVEList
Auto-Enrollment of Team Admins into Private Channels without explicit consent↗2025-03-21
▶
CVE-2025-27715 — Incorrect Authorization | cvebase