CVE-2025-27715

published 2025-03-21

CVE-2025-27715: 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…

low 2.7 CVSS 3.1

AV N AC L PR H UI N S U C N I L A N

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.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
github.com	mattermost_mattermost-server	>= 9.11.0+incompatible < 9.11.9+incompatible	9.11.9+incompatible
github.com	mattermost_mattermost_server_v8	>= 9.11.0 < 9.11.9	9.11.9
mattermost	mattermost	9.11.0 – 9.11.8	—
mattermost	mattermost_server	>= 9.11.0 < 9.11.9	9.11.9

CWE-863