MEDIUM6.1
GO-2026-4296
Mattermost Server is vulnerable to XSS through display name field in github.com/mattermost/mattermost-server
Quick fix
GO-2026-4296 — github.com/mattermost/mattermost-server: upgrade to the fixed version with the command below.
go get github.com/mattermost/mattermost-server@v4.0.5+incompatibleDetails
Mattermost Server is vulnerable to XSS through display name field in github.com/mattermost/mattermost-server
Are you affected?
Enter the version of the package you're using.
Affected packages
Go/github.com/mattermost/mattermost-server
Introduced in:
0Fixed in: 4.0.5+incompatibleFix
go get github.com/mattermost/mattermost-server@v4.0.5+incompatibleReferences
- https://github.com/advisories/GHSA-887v-xh2x-47cm[ADVISORY]
- https://nvd.nist.gov/vuln/detail/CVE-2017-18893[ADVISORY]
- https://github.com/mattermost/mattermost/commit/2a4d88d07c5815deac103e109550d25338507151[WEB]
- https://github.com/mattermost/mattermost/commit/670bfbf62686ebe9f2ab332733d851a62b6950b0[WEB]
- https://github.com/mattermost/mattermost/commit/d0b42b9e527e93a61fd06a9b9106fc97067807e4[WEB]
- https://mattermost.com/security-updates[WEB]