Pi-Hole/AdminLTE vulnerable due to improper access control in queryads endpoint

Vulnerability Description

Pi-Hole is a network-wide ad blocking via your own Linux hardware, AdminLTE is a Pi-hole Dashboard for stats and more. In case of an attack, the threat actor will obtain the ability to perform an unauthorized query for blocked domains on `queryads` endpoint. In the case of application, this vulnerability exists because of a lack of validation in code on a root server path: `/admin/scripts/pi-hole/phpqueryads.php.` Potential threat actor(s) are able to perform an unauthorized query search in blocked domain lists. This could lead to the disclosure for any victims' personal blacklists.

References

• https://github.com/pi-hole/AdminLTE/security/advisories/GHSA-6qh8-6rrj-7497
• https://github.com/pi-hole/AdminLTE/releases/tag/v5.18
• http://packetstormsecurity.com/files/174460/AdminLTE-PiHole-Broken-Access-Control.html