Vulnerability · Published Sep 29, 2026 · Assigned by GitHub_M
CVE-2026-49243Webmin: Reflected XSS in the Configuration module
Critical 9.6
In plain English
A critical-severity cross-site scripting in webmin from webmin. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).
Severity (CVSS 3.1)9.6Critical
Exploit odds (30 days)0.3%top 77.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
References
- https://github.com/webmin/webmin/security/advisories/GHSA-hv4w-p8jq-2rp5 x_refsource_CONFIRM
- https://github.com/webmin/webmin/commit/2d016751399ed0f4159e72a6cbcd63694a84dabf x_refsource_MISC
- https://beaksec.github.io/posts/webmin-one-click-rce-via-xss x_refsource_MISC
- https://github.com/webmin/webmin/releases/tag/2.650 x_refsource_MISC