log_file_viewer.php in MFScripts YetiShare 3.5.2 through 4.5.3 does not sanitize or encode the output from the lFile parameter on the page, which would allow an attacker to input HTML or execute scripts on the site, aka XSS.Referenceshttps://medium.com/%40jra8908/yetishare-3-5-2-4-5-3-multiple-vulnerabilities-2d01d0cd7459https://github.com/jra89/CVE-2019-19738
