CVE-2025-53971GO-2025-3902GHSA-4276-CM8C-788H
Channel and Team Membership APIs inadvertently allow loss of Member privileges.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 9.11.18+incompatible, 10.5.9+incompatible, 8.0.0-20250721095846-c602a4a78e1f, 10.5.9, 9.11.18
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
Mattermost versions 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate authorization for team scheme role modifications which allows Team Admins to demote Team Members to Guests via the PUT /api/v4/teams/team-id/members/user-id/schemeRoles API endpoint.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Mattermost Mattermost
From 10.5.0 · through 10.5.8; From 9.11.0 · through 9.11.17
- github.com/mattermost/mattermost-serverGo
From 9.11.0+incompatible · fixed in 9.11.18+incompatible; From 10.5.0+incompatible · fixed in 10.5.9+incompatible
- github.com/mattermost/mattermost-server/v5Go
All versions
- github.com/mattermost/mattermost-server/v6Go
All versions
- github.com/mattermost/mattermost/server/v8Go
fixed in 8.0.0-20250721095846-c602a4a78e1f
- github.com/mattermost/mattermost-serverGo
From 10.5.0 · fixed in 10.5.9
- github.com/mattermost/mattermost-serverGo
From 9.11.0 · fixed in 9.11.18
- github.com/mattermost/mattermost-server/v5Go
through 5.39.3
- github.com/mattermost/mattermost-server/v6Go
through 6.7.2