CVE-2023-1774: Missing Authorization

March 31, 2023 (updated April 15, 2023)

When processing an email invite to a private channel on a team, Mattermost fails to validate the inviter’s permission to that channel, allowing an attacker to invite themselves to a private channel.

References

github.com/advisories/GHSA-9hj7-v56g-rhf6
mattermost.com/security-updates/
nvd.nist.gov/vuln/detail/CVE-2023-1774

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