CVE-2026-123621

Usermin through 2.570 Path Traversal File Write via detachall.cgi

Published Nov 6, 2026 CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
Description
Usermin through 2.570 contains a path traversal vulnerability in mailbox/detachall.cgi that allows remote unauthenticated attackers to write files outside the temporary directory via unsanitized attachment filenames. Attackers can email attachments with ../ sequences in filenames, and when the recipient downloads all attachments, files like ~/.forward are overwritten, enabling command execution.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Usermin through 2.570 contains a path traversal vulnerability in mailbox/detachall.cgi that allows remote unauthenticated attackers to write files outside the temporary directory via unsanitized attachment filenames. Attackers can email attachments with ../ sequences in filenames, and when the recipient downloads all attachments, files like ~/.forward are overwritten, enabling command execution.
Title Usermin through 2.570 Path Traversal File Write via detachall.cgi
First Time appeared Webmin
Webmin usermin
Weaknesses CWE-22
CPEs cpe:2.3:a:webmin:usermin:*:*:*:*:*:*:*:*
Vendors & Products Webmin
Webmin usermin
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 6, 2026, 5:26 PM
Reserved
Nov 6, 2026, 1:04 AM
Status
Awaiting Analysis
Published
Nov 6, 2026, 3:17 PM
Modified
Nov 12, 2026, 9:30 PM