CVE-2024-36257

Lack of permission check when updating the profile picture of a remote user (shared channels enabled)

State: Published
Severity: 2.7 Low
Published: Jul 3, 2024
Updated: Aug 2, 2024
Reserved: Jul 1, 2024

Description

Mattermost versions 9.5.x <= 9.5.5 and 9.8.0, when using shared channels with multiple remote servers connected, fail to check that the remote server A requesting the server B to update the profile picture of a user is the remote that actually has the user as a local one . This allows a malicious remote A to change the profile images of users that belong to another remote server C that is connected to the server A.

Scores

CVSS	Score	Vector	Source
3.1	2.7 Low	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N	Mattermost

Weaknesses

CWE-284 Improper Access Control

Affected Products

Product	Versions
MattermostMattermost	9.8.0Affected 9.5.0 through 9.5.5Affected 9.9.0Not affected 9.8.1Not affected 9.5.6Not affected

References

https://mattermost.com/security-updates

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