CVE-2017-18885: Mattermost Server allows attackers to gain privileges by accessing unintended API endpoints with users' credentials

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 attackers to gain privileges by accessing unintended API endpoints on a user’s behalf.

References

github.com/advisories/GHSA-g78f-6xq7-rrhq
github.com/mattermost/mattermost
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2017-18885

Code Behaviors & Features

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