Webmin through 2.670 contains a stored cross-site scripting vulnerability in the Shorewall and Shorewall6 modules' list.cgi, which renders table fields and COMMENT lines unescaped. Authenticated users with table edit permission can store JavaScript via savecmt.cgi or table entries that executes when other users, including root, view the list page.
https://github.com/webmin/webmin/issues/2908
https://github.com/webmin/webmin/commit/01b988dbf1e8f9926eec4b041d913167e0cc280f
https://github.com/webmin/webmin/blob/2.670/shorewall6/list.cgi#L58-L75
https://github.com/webmin/webmin/blob/2.670/shorewall/list.cgi#L56-L78
Published: 2026-11-08
Updated: 2026-11-10
Base Score: 4.7
Vector: CVSS2#AV:N/AC:L/Au:M/C:P/I:P/A:N
Severity: Medium
Base Score: 4.8
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Severity: Medium
Base Score: 4.8
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Severity: Medium
EPSS: 0.00191