Multiple SQL injection vulnerabilities in Joomla! 1.5.x before 1.5.22 allow remote attackers to execute arbitrary SQL commands via (1) the filter_order parameter in a com_weblinks category action to index.php, (2) the filter_order_Dir parameter in a com_weblinks category action to index.php, or (3) the filter_order_Dir parameter in a com_messages action to administrator/index.php.

Cross-site scripting (XSS) vulnerability in Joomla! 1.5.x before 1.5.21 and 1.6.x before 1.6.1 allows remote attackers to inject arbitrary web script or HTML via vectors involving "multiple encoded entities," as demonstrated by the query string to index.php in the com_weblinks or com_content component.

Multiple cross-site scripting (XSS) vulnerabilities in the Back End in Joomla! 1.5.x before 1.5.20 allow remote authenticated users to inject arbitrary web script or HTML via administrator screens.

Multiple cross-site scripting (XSS) vulnerabilities in the back end in Joomla! 1.5 through 1.5.17 allow remote attackers to inject arbitrary web script or HTML via unknown vectors related to "various administrator screens," possibly the search parameter in administrator/index.php.

Joomla! before 1.5.15 allows remote attackers to read an extension's XML file, and thereby obtain the extension's version number, via a direct request.

Unspecified vulnerability in the Front-End Editor in the com_content component in Joomla! before 1.5.15 allows remote authenticated users, with Author privileges, to replace the articles of an arbitrary user via unknown vectors.