VULNERABILITY INTELLIGENCE

CVE-2024-39839

CVSS score4.3 MEDIUM
EPSS probability0.34%
CISA KEVNot currently listed
Published2024-08-01
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

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.

Weakness classification

  • responsibledisclosure@mattermost.com: CWE-284
  • nvd@nist.gov: NVD-CWE-noinfo

Primary references