Multiple cross-site scripting (XSS) vulnerabilities in TWiki before 5.1.0 allow remote attackers to inject arbitrary web script or HTML via (1) the newtopic parameter in a WebCreateNewTopic action, related to the TWiki.WebCreateNewTopicTemplate topic; or (2) the query string to SlideShow.pm in the SlideShowPlugin.
Directory traversal vulnerability in bin/configure in TWiki before 4.2.3, when a certain step in the installation guide is skipped, allows remote attackers to read arbitrary files via a query string containing a .. (dot dot) in the image variable, and execute arbitrary files via unspecified vectors.
Eval injection vulnerability in lib/TWiki/Plugins.pm in TWiki before 6.0.1 allows remote attackers to execute arbitrary Perl code via the debugenableplugins parameter to do/view/Main/WebHome.