CVE-2026-123622

MEDIUM 6.1

Usermin through 2.570 XSS via mailbox detach.cgi type Parameter

CVSS Score

6.1

EPSS Score

0.0%

EPSS Percentile

0th

Usermin through 2.570 contains a cross-site scripting vulnerability in mailbox/detach.cgi that allows remote attackers to execute script by supplying an arbitrary type parameter that bypasses JavaScript filtering. Attackers can email an HTML attachment containing script and lure recipients to a detach.cgi link with type=text/html to run script in the victim's authenticated Usermin session.

CWE	CWE-79
Vendor	webmin
Product	usermin
Published	Nov 6, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

webmin / usermin

0 ≤ 2.570

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/webmin/usermin/issues/142 github.com: https://github.com/webmin/usermin github.com: https://github.com/webmin/usermin/commit/c5c43b9ad04a60809ac2eb271bf8f3d0fec2e46a github.com: https://github.com/webmin/usermin/blob/2.570/mailbox/detach.cgi#L80-L83 hackmd.io: https://hackmd.io/@leediay/H144QKY6zl vulncheck.com: https://www.vulncheck.com/advisories/usermin-through-2.570-xss-via-mailbox-detach-cgi-type-parameter

Credits

leediay153 from Viettel Post Ilia Ross (iliaross)