Medium severity · published Jun 30, 2025
CVE-2025-47871
Mattermost Playbooks exposes private channel metadata to unauthorized users via run metadata API
5.4
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
10.5.0 through 10.5.5; 9.11.0 through 9.11.15; 10.8.0; 10.7.0 through 10.7.2; 10.6.0 through 10.6.5 · source: vendor
MS
Mattermost Server · Mattermost
9.11.0 before 9.11.16; 10.5.0 before 10.5.6; 10.6.0 before 10.6.6; 10.7.0 before 10.7.3; 10.8.0; 10.8.0; +2 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-47871
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-47871
Vendor Advisory
https://mattermost.com/security-updates
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