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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Joomla! Project | Joomla! CMS | 2.5.0-3.9.27 | — |
Unscored
CVE-2021-26036
EUVD-2021-12859GHSA-g983-3grj-v7qw
[20210702] - Core - DoS through usergroup table manipulation
Published Jul 7, 2021 · Updated Feb 25, 2026 · Assigned by Joomla