Cross-site scripting (XSS) vulnerability in header.php in PunBB 1.2.10 allows remote attackers to inject arbitrary web script or HTML via the URL, which is not properly handled when the PHP_SELF variable is used to handle a pun_page tag.
https://exchange.xforce.ibmcloud.com/vulnerabilities/24982
http://www.vupen.com/english/advisories/2006/0773
http://www.securityfocus.com/bid/16891
http://www.punbb.org/download/patch/punbb-1.2.10_to_1.2.11.patch