CVE-2025-47871

published 2025-06-30

CVE-2025-47871: 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 validate channel membership when…

Priority P4 29 medium 5.4 CVSS 3.1

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

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 validate channel membership when retrieving playbook run metadata, allowing authenticated users who are playbook members but not channel members to access sensitive information about linked private channels including channel name, display name, and participant count through the run metadata API endpoint.

Affected

22 ranges

Vendor	Product	Version range	Fixed in
github.com	mattermost_mattermost-server	>= 0 < 0.0.0-20250513065225-4ae5d647fb88	0.0.0-20250513065225-4ae5d647fb88
github.com	mattermost_mattermost-server	>= 10.5.0+incompatible < 10.5.6+incompatible	10.5.6+incompatible
github.com	mattermost_mattermost-server	>= 10.6.0+incompatible < 10.6.6+incompatible	10.6.6+incompatible
github.com	mattermost_mattermost-server	>= 10.7.0+incompatible < 10.7.3+incompatible	10.7.3+incompatible
github.com	mattermost_mattermost-server	>= 10.8.0+incompatible < 10.8.1+incompatible	10.8.1+incompatible
github.com	mattermost_mattermost-server	>= 9.11.0+incompatible < 9.11.16+incompatible	9.11.16+incompatible
github.com	mattermost_mattermost_server_v8	>= 0 < 8.0.0-20250513065225-4ae5d647fb88	8.0.0-20250513065225-4ae5d647fb88
github.com	mattermost_mattermost_server_v8	>= 10.5.0 < 10.5.6	10.5.6
github.com	mattermost_mattermost_server_v8	>= 10.6.0 < 10.6.6	10.6.6
github.com	mattermost_mattermost_server_v8	>= 10.7.0 < 10.7.3	10.7.3
github.com	mattermost_mattermost_server_v8	>= 10.8.0 < 10.8.1	10.8.1
github.com	mattermost_mattermost_server_v8	>= 9.11.0 < 9.11.16	9.11.16
mattermost	mattermost	—	—
mattermost	mattermost	10.5.0 – 10.5.5	—
mattermost	mattermost	10.6.0 – 10.6.5	—
mattermost	mattermost	10.7.0 – 10.7.2	—
mattermost	mattermost	9.11.0 – 9.11.15	—
mattermost	mattermost_server	—	—
mattermost	mattermost_server	>= 10.5.0 < 10.5.6	10.5.6
mattermost	mattermost_server	>= 10.6.0 < 10.6.6	10.6.6
mattermost	mattermost_server	>= 10.7.0 < 10.7.3	10.7.3
mattermost	mattermost_server	>= 9.11.0 < 9.11.16	9.11.16

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.

CWE-863