Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2025-10545
CVE-2025-10545:
vulnerability analysis and mitigation
Overview
CVE-2025-10545 affects Mattermost versions 10.5.x <= 10.5.10 and 10.11.x <= 10.11.2. The vulnerability is related to improper validation of guest user permissions when adding channel members, which allows guest users to add any team members to their private channels through the /api/v4/channels/{channel_id}/members endpoint (NVD).
Technical details
The vulnerability is classified as an Incorrect Authorization issue (CWE-863). It has been assigned a CVSS v3.1 base score of 4.3 (MEDIUM) by NIST with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N, while Mattermost assessed it with a score of 3.1 (LOW) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N (NVD).
Impact
The vulnerability allows guest users to bypass permission restrictions and add any team members to their private channels, potentially leading to unauthorized access to private channel content and compromising the confidentiality of communications (NVD).
Mitigation and workarounds
Users should upgrade to Mattermost versions 10.5.11 or 10.11.3 or later to address this vulnerability (NVD).
Additional resources
Source: This report was generated using AI
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