HIGH7.5

GO-2025-4184

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

Quick fix

GO-2025-4184 — github.com/mattermost/mattermost-server: upgrade to the fixed version with the command below.

go get github.com/mattermost/mattermost-server@v4.2.2+incompatible

Details

Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names 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: 4.2.2+incompatible

Fixgo get github.com/mattermost/mattermost-server@v4.2.2+incompatible

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[WEB]