GO-2025-4197 — Vulnetix

GO-2025-4197 PUBLISHED

Mattermost Server exposes OAuth personal access tokens to attackers in github.com/mattermost/mattermost-server

Affected Products

Vendor	Product	Versions
github.com	mattermost/mattermost-server	0, 4.2.0-rc1+incompatible, 4.3.0-rc1+incompatible

Timeline

Dec 8, 2025 CVE Published
Mar 3, 2026 CVE Updated
May 1, 2026 Security Advisory

References

https://github.com/advisories/GHSA-876j-jfqf-m7j7 advisory
https://nvd.nist.gov/vuln/detail/CVE-2017-18884 advisory
https://mattermost.com/security-updates url

Open in Interactive Console →

$ Console Community · 100/wk Open console ›