Mattermost allows guest users to view information about public teams they are not members of in github.com/mattermost/mattermost-server
Mattermost allows guest users to view information about public teams they are not members of in github.com/mattermost/mattermost-server
02 / AFFECTED SOFTWARE
Affected packages
49 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Mattermost allows guest users to view information about public teams they are not members of in github.com/mattermost/mattermost-server
Mattermost versions 10.5.x <= 10.5.4, 9.11.x <= 9.11.13 fail to properly restrict API access to team information, allowing guest users to bypass permissions and view information about public teams they are not members of via a direct API call to /api/v4/teams/{team_id}.
Mattermost versions 10.5.x <= 10.5.4, 9.11.x <= 9.11.13 fail to properly restrict API access to team information, allowing guest users to bypass permissions and view information about public teams they are not members of via a direct API call to /api/v4/teams/{team_id}.
05 / REFERENCES
Further evidence
- https://github.com/advisories/GHSA-jwhw-xf5v-qgxc
- https://github.com/mattermost/mattermost/commit/2138a5f2ca6f75e2b99f6a04ea569d0f680c4fab
- https://github.com/mattermost/mattermost/commit/701ddc896a107b13f457fbdbe229bce5019fc516
- https://mattermost.com/security-updates
- https://nvd.nist.gov/vuln/detail/CVE-2025-4128
- https://github.com/mattermost/mattermost
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/4xxx/CVE-2025-4128.json