CVE-2024-39839

2024-08-0115:15:12

CWE-284

[email protected]

web.nvd.nist.gov

mattermost

vulnerability

remote users

arbitrary username

CVSS3

4.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

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

EPSS

Percentile

14.7%

JSON

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.

Affected configurations

Nvd

Node

mattermostmattermost_serverRange9.5.0–9.5.7

mattermostmattermost_serverRange9.7.0–9.7.6

mattermostmattermost_serverRange9.8.0–9.8.2

mattermostmattermost_serverMatch9.9.0

VendorProductVersionCPE
mattermostmattermost_server*cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
mattermostmattermost_server9.9.0cpe:2.3:a:mattermost:mattermost_server:9.9.0:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
mattermost	mattermost_server	*	cpe:2.3:a:mattermost:mattermost_server::::::::
mattermost	mattermost_server	9.9.0	cpe:2.3:a:mattermost:mattermost_server:9.9.0:::::::*