WordPress Plugin Special Text Boxes Arbitrary File Upload

WordPress Plugin Special Text Boxes is prone to a vulnerability that lets attackers upload arbitrary files because the application fails to properly sanitize user-supplied input. An attacker can exploit this vulnerability to upload arbitrary code and run it in the context of the webserver process. This may facilitate unauthorized access or privilege escalation other attacks are also possible. WordPress Plugin Special Text Boxes version 5.1.90 is vulnerable prior versions may also be affected.