CVE-2024-39839

MEDIUM Year: 2024
CVSS v3 Score
4.3
Medium
Weakness Type
CWE-284
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Vulnerability Description

Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5, 9.8.x <= 9.8.1 fail to disallow users to set their own remote username, when shared channels were enabled, which allows a user on a remote to set their remote username prop to an arbitrary string, which would be then synced to the local server as long as the user hadn't been synced before.

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