CVE-2023-2783: Mattermost Server Missing Authorization vulnerability

June 16, 2023 (updated July 25, 2025)

Mattermost Apps Framework fails to verify that a secret provided in the incoming webhook request allowing an attacker to modify the contents of the post sent by the Apps.

References

github.com/advisories/GHSA-455c-vqrf-mghr
github.com/mattermost/mattermost-server
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2023-2783

Code Behaviors & Features

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