HIGH 8.6 NVD
CVE-2026-123621
Usermin through 2.570 contains a path traversal vulnerability in mailbox/detachall.cgi that allows remote unauthenticated attackers to write files outside the t
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.
References
- https://github.com/webmin/usermin
- https://github.com/webmin/usermin/blob/2.570/mailbox/detachall.cgi#L43-L51
- https://github.com/webmin/usermin/commit/cb4614e8319e0932b10533a4d5606debf5f40e14
- https://github.com/webmin/usermin/issues/142
- https://hackmd.io/@leediay/H144QKY6zl
This high severity vulnerability with a CVSS score of 8.6 was published on 2026-11-06 via NVD.
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