Critical severity · published Sep 29, 2026
CVE-2026-49243
Webmin: Reflected XSS in the Configuration module
9.6
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WE
webmin · webmin
< 2.650 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-49243
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-49243
x_refsource_CONFIRM
https://github.com/webmin/webmin/security/advisories/GHSA-hv4w-p8jq-2rp5
x_refsource_MISC
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
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