In Joomla! before 3.8.0, inadequate escaping in the LDAP authentication plugin can result in a disclosure of a username and password.

SQL injection vulnerability in the RSGallery2 (comrsgallery2) component before 2.3.0 for Joomla! 1.5.x, and before 3.2.0 for Joomla! 2.5.x, allows remote attackers to execute arbitrary SQL commands via unspecified vectors.

Joomla! 2.5.x before 2.5.25, 3.x before 3.2.4, and 3.3.x before 3.3.4 allows remote attackers to authenticate and bypass intended access restrictions via vectors involving LDAP authentication.

Akeeba Restore (restore.php), as used in Joomla! 2.5.4 through 2.5.25, 3.x through 3.2.5, and 3.3.0 through 3.3.4; Akeeba Backup for Joomla! Professional 3.0.0 through 4.0.2; Backup Professional for WordPress 1.0.b1 through 1.1.3; Solo 1.0.b1 through 1.1.2; Admin Tools Core and Professional 2.0.0 through 2.4.4; and CMS Update 1.0.a1 through 1.0.1, when performing a backup or update for an archive, does not delete parameters from $GET and $POST when it is cleansing $REQUEST, but later accesses $GET and $POST using the getQueryParam function, which allows remote attackers to bypass encryption and execute arbitrary code via a command message that extracts a crafted archive.

Joomla! 1.5.x, 2.x, and 3.x before 3.4.6 allow remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via the HTTP User-Agent header, as exploited in the wild in December 2015.

Improper cache invalidation in Joomla! CMS 1.7.3 through 3.7.2 leads to disclosure of form contents.

administrator/components/commedia/helpers/media.php in the media manager in Joomla! 2.5.x before 2.5.14 and 3.x before 3.1.5 allows remote authenticated users or remote attackers to bypass intended access restrictions and upload files with dangerous extensions via a filename with a trailing . (dot), as exploited in the wild in August 2013.

In Joomla! before 3.7.4, inadequate filtering of potentially malicious HTML tags leads to XSS vulnerabilities in various components.

Missing CSRF token checks and improper input validation in Joomla! CMS 1.7.3 through 3.7.2 lead to an XSS vulnerability.

The RSGallery2 (comrsgallery2) component before 3.2.0 for Joomla! 2.5.x does not place index.html files in image directories, which allows remote attackers to list image filenames via a request for a directory URI.

Unspecified vulnerability in Joomla! before 2.5.4 before 2.5.26, 3.x before 3.2.6, and 3.3.x before 3.3.5 allows attackers to cause a denial of service via unspecified vectors.

Joomla! 2.5.x before 2.5.8 and 3.0.x before 3.0.2 allows remote attackers to conduct clickjacking attacks via unspecified vectors involving "Inadequate protection."

Cross-site scripting (XSS) vulnerability in Joomla! 2.5.x before 2.5.7 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Cross-site scripting (XSS) vulnerability in the highlighter plugin in Joomla! 2.5.x before 2.5.10 and 3.0.x before 3.0.4 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Cross-site scripting (XSS) vulnerability in the Voting plugin in Joomla! 2.5.x before 2.5.10 and 3.0.x before 3.0.4 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Cross-site scripting (XSS) vulnerability in Joomla! CMS 2.5.x before 2.5.19 and 3.x before 3.2.3 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Joomla! 2.5.x before 2.5.10 and 3.0.x before 3.0.4 allows remote authenticated users to bypass intended privilege requirements and list the privileges of arbitrary users via unspecified vectors.

Joomla! 2.5.x before 2.5.10 and 3.0.x before 3.0.4 allows remote authenticated users to bypass intended privilege requirements and delete the private messages of arbitrary users via unspecified vectors.