An issue was discovered in Pimcore before 5.7.1. An attacker with classes permission can send a POST request to /admin/class/bulk-commit, which will make it possible to exploit the unserialize function when passing untrusted values in the data parameter to bundles/AdminBundle/Controller/Admin/DataObject/ClassController.php.
packetstormsecurity.com/files/152667/Pimcore-Unserialize-Remote-Code-Execution.html
www.rapid7.com/db/modules/exploit/multi/http/pimcore_unserialize_rce
blog.certimetergroup.com/it/articolo/security/polyglot_phar_deserialization_to_rce
github.com/pimcore/pimcore/commit/38a29e2f4f5f060a73974626952501cee05fda73
snyk.io/vuln/SNYK-PHP-PIMCOREPIMCORE-173998
www.exploit-db.com/exploits/46783/