CVE-2026-123622
Usermin through 2.570 XSS via mailbox detach.cgi type Parameter
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.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| usermin webmin webmin/usermin
github |
≥ 0; ≤ 2.570 (affected, custom)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 5.1 medium |
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 | CNA: VulnCheck |
| 3.1 / 6.1 medium |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N | CNA: VulnCheck |
| 4.0 / 5.1 medium |
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
| 3.1 / 6.1 medium |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N | NVD: [email protected] |
Exploit evidence
- https://hackmd.io/@leediay/H144QKY6zl
exploit · ADP: CISA-ADP
References
- https://github.com/webmin/usermin/issues/142CNA: VulnCheck · issue-tracking
- https://github.com/webmin/userminCNA: VulnCheck · product
- https://github.com/webmin/usermin/commit/c5c43b9ad04a60809ac2eb271bf8f3d0fec2e46aCNA: VulnCheck · patch
- https://github.com/webmin/usermin/blob/2.570/mailbox/detach.cgi#L80-L83CNA: VulnCheck · technical-description
- https://hackmd.io/@leediay/H144QKY6zlCNA: VulnCheck · technical-description
- https://www.vulncheck.com/advisories/usermin-through-2.570-xss-via-mailbox-detach-cgi-type-parameterCNA: VulnCheck · third-party-advisory
- https://hackmd.io/@leediay/H144QKY6zlADP: CISA-ADP · exploit
- https://github.com/webmin/usermin[email protected]
- https://github.com/webmin/usermin/blob/2.570/mailbox/detach.cgi#L80-L83[email protected]
- https://github.com/webmin/usermin/commit/c5c43b9ad04a60809ac2eb271bf8f3d0fec2e46a[email protected]
- https://github.com/webmin/usermin/issues/142[email protected]
- https://hackmd.io/@leediay/H144QKY6zl[email protected]
- https://www.vulncheck.com/advisories/usermin-through-2.570-xss-via-mailbox-detach-cgi-type-parameter[email protected]
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