CVE-2024-36257

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

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

Solution:

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

Category

2.7
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.11%
Vendor Advisory mattermost.com
Affected: Mattermost Mattermost
Published at:
Updated at:

References

Link Tags
https://mattermost.com/security-updates vendor advisory

Frequently Asked Questions

What is the severity of CVE-2024-36257?
CVE-2024-36257 has been scored as a low severity vulnerability.
How to fix CVE-2024-36257?
To fix CVE-2024-36257: Update Mattermost to versions 9.9.0, 9.8.1, 9.5.6 or higher.
Is CVE-2024-36257 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-36257 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-36257?
CVE-2024-36257 affects Mattermost Mattermost.
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