Cross-site scripting (XSS) vulnerability in a certain module, possibly poll or Pool, for XOOPS allows remote attackers to inject arbitrary web script or HTML via JavaScript in the SRC attribute of an IMG element in a comment.
https://exchange.xforce.ibmcloud.com/vulnerabilities/24091
http://www.xoops.org/modules/newbb/viewtopic.php?topic_id=45637&forum=2&post_id=200481
http://www.securityfocus.com/archive/1/421325/100/0/threaded