GHSA-FP5J-J7J4-MCXC CraftCMS has an RCE vulnerability via relational conditionals in the control panel

A Remote Code Execution vulnerability exists in the Craft CMS 5 conditions system. The BaseElementSelectConditionRule::getElementIds method passes user-controlled string input through renderObjectTemplate -- an unsandboxed Twig rendering function with escaping disabled. Any authenticated Control...