CVE-2026-49243 Webmin - Stored XSS

Webmin < 2.650 contains a stored XSS vulnerability caused by improper input sanitization, letting remote attackers execute attacker-controlled commands via malicious links, exploit requires user interaction.

CVSS base score 9.6 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.30% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Published
29 September 2026
Updated
15 October 2026
Weakness
CWE-79

Vendor fix

Update to version 2.650 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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