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.

Multiple cross-site scripting (XSS) vulnerabilities in Joomla! 1.5.7 and earlier allow remote authenticated users with certain privileges to inject arbitrary web script or HTML via (1) the title and description parameters to the com_weblinks module and (2) unspecified vectors in the com_content module related to "article submission."

Unspecified vulnerability in Joomla! before 1.5.4 has unknown impact and attack vectors related to a "User Redirect Spam fix," possibly an open redirect vulnerability.

Joomla! before 1.5.4 allows attackers to access administration functionality, which has unknown impact and attack vectors related to a missing "LDAP security fix."

Joomla! before 1.5.4 does not configure .htaccess to apply certain security checks that "block common exploits" to SEF URLs, which has unknown impact and remote attack vectors.

The file caching implementation in Joomla! before 1.5.4 allows attackers to access cached pages via unknown attack vectors.

com_categories in Joomla! before 1.0.12 does not validate input, which has unknown impact and remote attack vectors.

Multiple unspecified vulnerabilities in Joomla! before 1.0.12 have unknown impact and attack vectors related to (1) "unneeded legacy functions" and (2) "Several low level security fixes."

Cross-site scripting (XSS) vulnerability in Joomla! before 1.0.12 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors, possibly related to poll.php or the module title.