Cloud Vulnerability DB
An open project to list all known cloud vulnerabilities and Cloud Service Provider security issues
Vulnerability DatabaseCVE-2024-39777
CVE-2024-39777:
Mattermost vulnerability analysis and mitigation
Overview
Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5, and 9.8.x <= 9.8.1 contain a vulnerability related to shared channels functionality. The vulnerability allows unauthorized exposure of local channels through unsolicited invites when shared channels are enabled (NIST NVD, CVE MITRE).
Technical details
The vulnerability is classified with a CVSS v3.1 base score of 9.6 (Critical) according to NIST NVD assessment, while Mattermost's own assessment rates it at 8.7 (High). The vulnerability is categorized under CWE-284 (Improper Access Control). The technical nature of the flaw involves a failure to properly validate and control access permissions for channel sharing functionality (NIST NVD).
Impact
When exploited, this vulnerability allows a malicious remote actor to force-share existing local channels without the consent of the local administrator. This results in unauthorized access to potentially sensitive channel content and bypasses normal administrative controls (NIST NVD).
Mitigation and workarounds
Organizations should upgrade to the fixed versions: 9.5.7 or later for the 9.5.x series, 9.7.6 or later for the 9.7.x series, 9.8.2 or later for the 9.8.x series, or newer than 9.9.0 for the 9.9.x series (NIST NVD).
Additional resources
Source: This report was generated using AI
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