title: [20210702] - Core - DoS through usergroup table manipulation
description: An issue was discovered in Joomla! 2.5.0 through 3.9.27. Missing validation of input could lead to a broken usergroups table.
problem types: CSRF
affected:
{
product: Joomla! CMS
vendor: Joomla! Project
versions:
status: affected, version: 2.5.0-3.9.27
}