GHSA-3x67-4c2c-w45m: Admidio has a Second-Order SQL Injection via List Configuration (lsc_special_field, lsc_sort, lsc_filter)

The MyList configuration feature in Admidio allows authenticated users to define custom list column layouts. User-supplied column names, sort directions, and filter conditions are stored in the adm_list_columns table via prepared statements (safe storage), but are later read back and interpolated directly into dynamically constructed SQL queries without sanitization or parameterization. This is a classic second-order SQL injection: safe write, unsafe read.

An attacker can inject arbitrary SQL through these stored values to read, modify, or delete any data in the database, potentially achieving full database compromise.