Cross-site scripting (XSS) vulnerability in modules/private_messages/index.php in PowerPortal 1.x allows remote attackers to inject arbitrary web script or HTML via the (1) SUBJECT or (2) MESSAGE field.
https://exchange.xforce.ibmcloud.com/vulnerabilities/16838
https://euvd.enisa.europa.eu/vulnerability/EUVD-2004-2505
http://www.securityfocus.com/bid/10835
http://www.securiteam.com/unixfocus/5TP0O2ADFK.html