CVE-2025-4128 — Mattermost Guest User Information Disclosure Vulnerability
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…
Published: 2025-06-11 · CVSS: 3.1 · CVSS 3.1
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}.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7