CVE-2026-13426

The Mattermost Go module github.com/mattermost/mattermost/server/public versions

Unfixed XSS vulnerability at client4.addonchat.com

Security researcher Azat Harutyunyan, has submitted on 01/06/2010 a cross-site-scripting XSS vulnerability affecting client4.addonchat.com, which at the time of submission ranked 50545 on the web according to Alexa. We manually validated and published a mirror of this vulnerability on 06/07/2010...