Mattermost Server allows attackers to create buttons that can launch API requests

GHSA-m497-hq5x-6jcv · CVE-2017-18890 · GO-2025-4202

Published May 24, 2022 · Modified Dec 15, 2025

Description

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

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2017-18890
PACKAGE https://github.com/mattermost/mattermost
WEB https://mattermost.com/security-updates

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