In Joomla! 3.2.0 through 3.6.5 (fixed in 3.7.0), inadequate MIME type checks allowed low-privilege users to upload swf files even if they were explicitly forbidden.

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

In Joomla! 3.2.0 through 3.6.5 (fixed in 3.7.0), inadequate filtering leads to XSS in the template manager component.

In Joomla! 1.5.0 through 3.6.5 (fixed in 3.7.0), inadequate filtering of multibyte characters leads to XSS vulnerabilities in various components.

In Joomla! 1.5.0 through 3.6.5 (fixed in 3.7.0), mail sent using the JMail API leaked the used PHPMailer version in the mail headers.

In Joomla! 1.5.0 through 3.6.5 (fixed in 3.7.0), inadequate filtering of specific HTML attributes leads to XSS vulnerabilities in various components.

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

In Joomla! before 3.8.2, a logic bug in com_fields exposed read-only information about a site's custom fields to unauthorized users.

In Joomla! before 3.8.0, a logic bug in a SQL query could lead to the disclosure of article intro texts when these articles are in the archived state.

In Joomla! before 3.8.2, a bug allowed third parties to bypass a user's 2-factor authentication method.

In Joomla! 3.2.0 through 3.6.5 (fixed in 3.7.0), inadequate escaping of file and folder names leads to XSS vulnerabilities in the template manager component.

Joomla! 3.4.4 through 3.6.3 allows attackers to reset username, password, and user group assignments and possibly perform other user account modifications via unspecified vectors.

The CMS installer in Joomla! before 3.7.4 does not verify a user's ownership of a webspace, which allows remote authenticated users to gain control of the target application by leveraging Certificate Transparency logs.

Open redirect vulnerability in Joomla! CMS 3.0.0 through 3.4.1.

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

The file scanning mechanism of JFilterInput::isFileSafe() in Joomla! CMS before 3.6.5 does not consider alternative PHP file extensions when checking uploaded files for PHP content, which enables a user to upload and execute files with the `.php6`, `.php7`, `.phtml`, and `.phpt` extensions. Additionally, JHelperMedia::canUpload() did not blacklist these file extensions as uploadable file types.

The register method in the UsersModelRegistration class in controllers/user.php in the Users component in Joomla! before 3.6.4 allows remote attackers to gain privileges by leveraging incorrect use of unfiltered data when registering on a site.

The register method in the UsersModelRegistration class in controllers/user.php in the Users component in Joomla! before 3.6.4, when registration has been disabled, allows remote attackers to create user accounts by leveraging failure to check the Allow User Registration configuration setting.

An issue was discovered in templates/beez3/html/com_content/article/default.php in Joomla! before 3.6.5. Inadequate permissions checks in the Beez3 layout override of the com_content article view allow users to view articles that should not be publicly accessible, as demonstrated by an index.php?option=com_content&view=article&id=1&template=beez3 request.

SQL injection vulnerability in Joomla! 3.x before 3.4.7 allows attackers to execute arbitrary SQL commands via unspecified vectors.