VDB
GO-2026-4302
GO-2026-4302
PUBLISHED
CVSS 9.300000190734863 CRITICAL
Mattermost Server vulnerable to XSS via an uploaded file in github.com/mattermost/mattermost-server
Risk Scores
CVSS v4.0
9.300000190734863
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| github.com | mattermost/mattermost-server | 0, 3.10.0+incompatible, 0 |
Timeline
- Jan 13, 2026 CVE Published
- Mar 3, 2026 CVE Updated
- May 1, 2026 Security Advisory
References
- https://github.com/advisories/GHSA-8pff-p3gx-w4jf advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-18904 advisory
- https://github.com/mattermost/mattermost/commit/6a2754376c8c8270be5e11e3fdab589659d0cc8d url
- https://github.com/mattermost/mattermost/commit/bde06a7bc3a03a56da224c1ffcd8bffb0af8071b url
- https://github.com/mattermost/mattermost/commit/f06c5bef4d78966c60b153bbec6eea4ec0be9e68 url
- https://mattermost.com/security-updates url