CVE-2024-39839 MEDIUM

CVE-2024-39839: Remote username set to an arbitrary string by remote user

Vendor Mattermost
Product Mattermost
Weakness CWE-284
Published August 1, 2024
Last update August 1, 2024
View on NVD All CVEs

CVSS base score

4.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 1, 2024 CVE published
August 1, 2024 Record updated