Xerte Online Toolkits versions 3.15 and earlier contain a relative path traversal vulnerability in the elFinder connector endpoint at /editor/elfinder/php/conne…

Xerte Online Toolkits versions 3.15 and earlier contain a relative path traversal vulnerability in the elFinder connector endpoint at /editor/elfinder/php/connector.php. The vulnerability exists because the name parameter in rename commands is not properly sanitized for path traversal sequences. Attackers can exploit this by supplying directory traversal sequences in the name value to move files from project media directories to arbitrary filesystem locations. This can lead to overwriting application files, achieving stored cross-site scripting, or when combined with other vulnerabilities, enable unauthenticated remote code execution by moving PHP code files to the application root. The vulnerability affects the file management functionality of the web-based learning platform.