CVE-2024-39839CWE-284

Remote username set to an arbitrary string by remote user

Medium · published August 1, 2024

CVSS v3.1
4.3
EPSS
0%
Percentile
26.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00338 · 26.0th percentile
Weakness
CWE-284 · Improper Access Control
Published
2024-08-01T14:05Z
EPSS history
Timeline
  • 01 AUG 14:05Z
    Remote username set to an arbitrary string by remote user
    cvelistv5