CVE-2023-5193

System Role with manage posts permission can read posts of Direct Messages

Published Sep 29, 2023 CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed
Description
Mattermost fails to properly check permissions when retrieving a post allowing for a System Role with the permission to manage channels to read the posts of a DM conversation.

Remediation

Vendor Solution

Update Mattermost Server to versions 7.8.10, 8.0.2, 8.1.1 or higher

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2023-2520 Mattermost fails to properly check permissions when retrieving a post allowing for a System Role with the permission to manage channels to read the posts of a DM conversation.
Github GHSA Github GHSA GHSA-h8wh-f7gw-fwpr Mattermost Incorrect Authorization vulnerability
References
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Sep 20, 2024, 4:01 PM
Reserved
Sep 26, 2023, 8:44 AM
Status
Modified
Published
Sep 29, 2023, 10:15 AM
Modified
Jun 17, 2026, 6:47 AM