GHSA-M2M5-RW3W-CWMJ ApostropheCMS: Client-side Prototype Pollution in apos.http.parseQuery leading to DOM-based XSS against authenticated users

Summary The client-side helper apos.http.parseQuery in ApostropheCMS builds a nested object from a URL query string without sanitizing the keys proto, constructor, or prototype. Parsing an attacker-controlled query string therefore writes arbitrary properties onto Object.prototype client-side...