SB2026072290 - Cross-site scripting in Webmin

Description

This security bulletin contains information about 1 vulnerability.

1) Cross-site scripting (CVE-ID: CVE-2026-49243)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 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]

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.

Remediation

Install update from vendor's website.

References

• https://github.com/webmin/webmin/security/advisories/GHSA-hv4w-p8jq-2rp5
• https://github.com/webmin/webmin/commit/2d016751399ed0f4159e72a6cbcd63694a84dabf