CVE-2017-18890: Mattermost Server allows attackers to create buttons that can launch API requests

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 an attacker to create a button that, when pressed by a user, launches an API request.

References

github.com/advisories/GHSA-m497-hq5x-6jcv
github.com/mattermost/mattermost
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2017-18890

Code Behaviors & Features

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