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An issue was discovered in Joomla! through 3.9.19. Inadequate filtering on the system information screen could expose Redis or proxy credentials

An issue was discovered in Joomla! through 3.9.19. Missing validation checks on the usergroups table object can result in a broken site configuration.

An issue was discovered in Joomla! through 3.9.19. A missing token check in the ajax_install endpoint of com_installer causes a CSRF vulnerability.

In Joomla! before 3.9.19, missing token checks in com_postinstall lead to CSRF.

In Joomla! before 3.9.19, lack of input validation in the heading tag option of the "Articles - Newsflash" and "Articles - Categories" modules allows XSS.

In Joomla! before 3.9.19, incorrect input validation of the module tag option in com_modules allows XSS.

In Joomla! before 3.9.19, the default settings of the global textfilter configuration do not block HTML inputs for Guest users.

An issue was discovered in Joomla! before 3.9.17. Incorrect ACL checks in the access level section of com_users allow the unauthorized deletion of usergroups.

An issue was discovered in Joomla! before 3.9.17. Improper input validations in the usergroup table class could lead to a broken ACL configuration.

An issue was discovered in Joomla! before 3.9.17. Incorrect ACL checks in the access level section of com_users allow the unauthorized editing of usergroups.