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.
Solution(s)
joomla-upgrade-3_9_28
Referenceshttps://attackerkb.com/topics/cve-2021-26036 CVE - 2021-26036 http://developer.joomla.org/security-centre/857-20210702-core-dos-through-usergroup-table-manipulation.html