The loadModule function in lib/WebGUI/Asset.pm in WebGUI before 7.5.30 (stable) allows remote attackers to execute arbitrary code by uploading a Perl module and accessing it via a crafted URL.
Cross-site scripting (XSS) vulnerability in Plain Black WebGUI before 7.4.24 allows remote attackers to inject arbitrary web script or HTML when creating a username, a different vulnerability than CVE-2007-0407.