Vulnerability in webmin

[ Why it matters ]Priority signals

• Critical severity: CVSS 9.6

[ Description ]Official description

Webmin is a web-based system administration tool for Unix-like servers. Prior to version 2.650, Webmin users who click on a malicious link to their server are vulnerable to this XSS vulnerability that could be used to execute attacker-controlled commands. This issue has been patched in version 2.650.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund29 Sep 2026WID-SEC-2026-3645

  Webmin: Vulnerability allows cross-site scripting Translated from German

  CVE-2026-49243

[ References ]References

• beaksec.github.io/posts/webmin-one-click-rce-via-xss
• github.com/webmin/webmin/commit/2d016751399ed0f4159e72a6cbcd63694a84dabf
• github.com/webmin/webmin/releases/tag/2.650
• github.com/webmin/webmin/security/advisories/GHSA-hv4w-p8jq-2rp5