The phpMyChat Plus 1.98 application is vulnerable to Sql Injection (Boolean based blind, Error-based, time-based blind) on the deluser.php page through the pmc_user parameter. POC code: Capture the request through Burpsuite and then use sqlmap to get the user tables.
The 'pmc_username' parameter of pass_reset.php is vulnerable to reflected XSS. Payload: '><script>alert('xss')</script> Vulnerable URL: http://localhost/plus/pass_reset.php?L=english&pmc_username=''><script>alert('xss')</script>