Cross-site scripting in Webmin - CVE-2026-49243
Published: July 22, 2026
Vulnerability identifier: #VU139172
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-49243
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute attacker-controlled commands.
The vulnerability exists due to cross-site scripting in Webmin's Configuration module when processing a malicious link. A remote attacker can trick the victim into clicking a crafted link to execute attacker-controlled commands.
User interaction is required to click a malicious link to the server.
Affected software
Webmin
How to mitigate CVE-2026-49243
Install security update from vendor's website.
Webmin - update to 2.642