CVE-2026-22678: Webmin < 2.641 Stored XSS via System and Server Status

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-21 · updated 2026-07-23
Weakness: CWE-79

Description

Webmin before 2.641 contains a stored cross-site scripting vulnerability in the email template description field of the System and Server Status module that allows low-privileged authenticated attackers to execute arbitrary JavaScript in the browser context of administrators by injecting unsanitized input stored in save_tmpl.cgi and rendered unescaped in list_tmpls.cgi.

Affected products

Webmin: before 2.641 — fixed in 2.641

How to fix

Upgrade to a fixed version: Webmin 2.641. Check the vendor advisory for mitigations.

References

https://webmin.com/changelog/webmin-2.641-released/
https://www.vulncheck.com/advisories/webmin-stored-xss-via-system-and-server-status

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