CVE-2024-36257

low-risk
Published 2024-07-03

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.

Do I need to act?

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0.15% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
2
CVSS 2.7/10 Low
NETWORK / LOW complexity

Affected Products (2)

Affected Vendors

Mattermost

References (2)

Vendor Advisory https://mattermost.com/security-updates
Vendor Advisory https://mattermost.com/security-updates
22
/ 100
low-risk
Severity 14/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 7/34 · Low