CVE-2024-36257

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

Published Jul 3, 2024 CVSS 3.1 · 2.7 Low EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Solution

Update Mattermost to versions 9.9.0, 9.8.1, 9.5.6 or higher.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-36003 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.
References
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Aug 2, 2024, 3:37 AM
Reserved
Jul 1, 2024, 10:22 AM
Status
Modified
Published
Jul 3, 2024, 9:15 AM
Modified
Jun 17, 2026, 7:36 AM