Cross-site scripting (XSS) vulnerability in index.php in Pligg 9.9.5 allows remote attackers to inject arbitrary web script or HTML via the category parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/44189
https://euvd.enisa.europa.eu/vulnerability/EUVD-2008-3558
http://www.securityfocus.com/bid/30516
http://www.rooksecurity.com/blog/?p=19