CVE-2017-18886: Mattermost Server does not properly restrict use of slash commands

May 24, 2022 (updated December 5, 2025)

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. It allows a bypass of restrictions on use of slash commands.

References

github.com/advisories/GHSA-wvjg-33p9-938h
github.com/mattermost/mattermost
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2017-18886

Code Behaviors & Features

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