Podlove Podcast Publisher < 2.6.0 - Authenticated SQL Injection

Description

During the security analysis, ThunderScan discovered SQL injection
vulnerability in Podlove Podcast Publisher WordPress plugin.

The easiest way to reproduce the vulnerability is to visit the
provided URL while being logged in as administrator or another user
that is authorized to access the plugin settings page. Users that do
not have full administrative privileges could abuse the database
access the vulnerability provides to either escalate their privileges
or obtain and modify database contents they were not supposed to be
able to.

Due to the missing nonce token, the attacker the vulnerable code is
also directly exposed to attack vectors such as Cross-Site Request
Forgery (CSRF).