CVE-2025-2527
vulnerability analysis and mitigation

Overview

Mattermost versions 10.5.x <= 10.5.2 and 9.11.x <= 9.11.11 contain an authorization vulnerability that failed to properly verify user permissions when accessing groups. The vulnerability was disclosed on May 15, 2025, and is tracked as CVE-2025-2527. This security issue affects the Mattermost collaboration platform and its group access control mechanisms (NVD, CVE).

Technical details

The vulnerability is classified as an Incorrect Authorization issue (CWE-863) with a CVSS v3.1 Base Score of 4.3 (Medium) and vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N. This indicates that the vulnerability requires network access and low privileges to exploit, with no user interaction needed (Wiz).

Impact

The vulnerability allows an attacker to view group information through API requests, potentially exposing sensitive group data to unauthorized users (NVD).

Mitigation and workarounds

Users should upgrade to versions newer than 10.5.2 for the 10.5.x series or versions newer than 9.11.11 for the 9.11.x series (Mattermost Security).

Additional resources


SourceThis report was generated using AI

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