A vulnerability was discovered in the filename parameter in pathindex.php?r=cms-backend/attachment/delete&sub=&filename=../../../../111.txt…

A vulnerability was discovered in the filename parameter in pathindex.php?r=cms-backend/attachment/delete&sub=&filename=../../../../111.txt&filetype=image/jpeg of the master version of RKCMS. This vulnerability allows for an attacker to perform a directory traversal via a crafted .txt file.