The Church Admin plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 5.0.28 due to insufficient validation of user-supplied URLs in the 'audio_url' parameter. This makes it possible for authenticated attackers, with Administrator-level access, to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.
Exploitability
AV:NAC:HPR:HUI:NScope
S:UImpact
C:NI:LA:N2.2/CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:NInput Validation