XSS in Webmin
CVE-2026-22678
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (11.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 11.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Webmin — versions 0
Weakness classification (CWE)
References
- webmin.com/changelog/webmin-2.641-released/ (release-notes, Release Notes, patch)
- www.vulncheck.com/advisories/webmin-stored-xss-via-system-and-server-status (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-22678?
- CVE-2026-22678 is a medium-severity vulnerability in Webmin, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-05-21.
- How severe is CVE-2026-22678?
- Medium severity. CVSS v3 base score is 5.4 out of 10.