CVE-2024-41162: Mattermost allows a remote actor to make an arbitrary local channel read-only

August 1, 2024 (updated August 2, 2024)

Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5 and 9.8.x <= 9.8.1 fail to disallow the modification of local channels by a remote, when shared channels are enabled, which allows a malicious remote to make an arbitrary local channel read-only.

References

github.com/advisories/GHSA-jr9x-3x7m-4j75
github.com/mattermost/mattermost
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2024-41162

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