CVE-2026-123621: fallo de gravedad alta en webmin usermin
Usermin through 2.570 Path Traversal File Write via detachall.cgi
Publicada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 8.6epss 1.0%
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.
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
Productos afectados
webmin · userminCVEs relacionadas — webmin usermin
En el mismo producto, de las más peligrosas a las menos.
Referencias
https://github.com/webmin/userminhttps://github.com/webmin/usermin/blob/2.570/mailbox/detachall.cgi#L43-L51https://github.com/webmin/usermin/commit/cb4614e8319e0932b10533a4d5606debf5f40e14https://github.com/webmin/usermin/issues/142https://hackmd.io/@leediay/H144QKY6zlhttps://www.vulncheck.com/advisories/usermin-through-2.570-path-traversal-file-write-via-detachall-cgi