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Mattermost allows remote actor to set arbitrary RemoteId values for synced users

Low severity GitHub Reviewed Published Aug 1, 2024 to the GitHub Advisory Database • Updated Sep 4, 2024

Package

gomod github.com/mattermost/mattermost/server/v8 (Go)

Affected versions

>= 9.5.0, < 9.5.7
= 9.9.0

Patched versions

9.5.7
9.9.1

Description

Mattermost versions 9.9.x <= 9.9.0 and 9.5.x <= 9.5.6 fail to validate the source of sync messages and only allow the correct remote IDs, which allows a malicious remote to set arbitrary RemoteId values for synced users and therefore claim that a user was synced from another remote.

References

Published by the National Vulnerability Database Aug 1, 2024
Published to the GitHub Advisory Database Aug 1, 2024
Reviewed Aug 2, 2024
Last updated Sep 4, 2024

Severity

Low

EPSS score

0.045%
(15th percentile)

CVE ID

CVE-2024-41926

GHSA ID

GHSA-9fpw-c9x7-cv3j

Source code

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