The activation resend function in the Profiles module in XOOPS before 2.4.1 sends activation codes in response to arbitrary activation requests, which allows remote attackers to bypass administrative approval via a request involving activate.php.
Cross-site scripting (XSS) vulnerability in modules/wfdownloads/newlist.php in XOOPS 1.0 allows remote attackers to inject arbitrary web script or HTML via the newdownloadshowdays parameter.
SQL injection vulnerability in index.php of WebChat 1.5 included in XOOPS 1.0 allows remote attackers to execute arbitrary SQL commands via the roomid parameter.