CVE-2021-38337: Improper Neutralization of Input During Web Page Generation

The RSVPMaker Excel WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to a reflected $SERVER"PHPSELF" value in the /phpexcel/PHPExcel/Shared/JAMA/docs/download.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.1...