The cachemgr
The cachemgr.cgi web module of Squid through 4.7 has XSS via the user_name or auth parameter.
Exploitability
AV:N
AC:L
PR:N
UI:R
Scope
S:C
Impact
C:L
I:L
A:N
6.1/CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N