CVE-2025-27715

Auto-Enrollment of Team Admins into Private Channels without explicit consent

State: Published
Severity: 3.3 Low
Published: Mar 21, 2025
Updated: Mar 21, 2025
Reserved: Mar 20, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	3.3 Low	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N	Mattermost

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
MattermostMattermost	9.11.0 through 9.11.8Affected 10.5.0Not affected 9.11.9Not affected

References

https://mattermost.com/security-updates

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