GO-2025-4184 — Vulnetix

GO-2025-4184 PUBLISHED CVSS 8.699999809265137 HIGH

Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names in github.com/mattermost/mattermost-server

Risk Scores

CVSS v4.0

8.699999809265137

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Affected Products

Vendor	Product	Versions
github.com	mattermost/mattermost-server	*, 0, 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-jc6w-8r7f-vmp5 advisory
https://nvd.nist.gov/vuln/detail/CVE-2017-18871 advisory
https://mattermost.com/security-updates url

Open in Interactive Console →