Cross-site scripting (XSS) vulnerability in search.php in Phorum, possibly 5.0.7 beta and earlier, allows remote attackers to inject arbitrary HTML or web script via the subject parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/16831
https://euvd.enisa.europa.eu/vulnerability/EUVD-2004-2234
http://www.securityfocus.com/bid/10822