Invision Community (aka IPS Community Suite or IP-Board) before 4.6.5.1 allows reflected XSS because the filenames of uploaded files become predictable through a brute-force attack against the PHP mt_rand function.Referenceshttps://ssd-disclosure.com/ssd-advisory-ip-board-stored-xss-to-rce-chain/https://invisioncommunity.com/release-notes/4651-r102/