Improper handling of identifiers lead to a SQL injection vulnerability in the quoteNameStr method of the database package. Please note: the affected method is a protected method. It has no usages in the original packages in neither the 2.x nor 3.x branch and therefore the vulnerability in question can not be exploited when using the original database class. However, classes extending the affected class might be affected, if the vulnerable method is used.
An issue was discovered in Joomla! 3.0.0 through 3.9.22. Improper filter blacklist configuration leads to a SQL injection vulnerability in the backend user list.
An issue was discovered in Joomla! 3.0.0 through 3.10.6 & 4.0.0 through 4.1.0. Inadequate filtering on the selected Ids on an request could resulted into an possible SQL injection.