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.

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 t…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (8.8th percentile) — read the EPSS interpretation.

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.

Affected products

Webmin — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (release-notes, Release Notes, patch)
disclosure@vulncheck.com (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.