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 3.9.16. Various actions in com_templates lack the required ACL checks, leading to various potential attack vectors.
An issue was discovered in Joomla! before 3.9.16. The lack of type casting of a variable in a SQL statement leads to a SQL injection vulnerability in the Featured Articles frontend menutype.