CVE-2024-39837: Mattermost did not properly restrict channel creation

August 1, 2024 (updated July 25, 2025)

Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6 fail to properly restrict channel creation which allows a malicious remote to create arbitrary channels, when shared channels were enabled.

References

github.com/advisories/GHSA-vvpg-55p7-5h8w
github.com/mattermost/mattermost
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2024-39837
pkg.go.dev/vuln/GO-2024-3032

Code Behaviors & Features

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