Description
Joomla! Core is prone to a cross-site request forgery vulnerability. Exploiting this issue may allow a remote attacker to perform certain administrative actions and gain unauthorized access to the affected application; other attacks are also possible. Joomla! Core versions 3.x.x ranging from 3.0.0 and up to and including 3.9.26 are vulnerable.
Remediation
Update to Joomla! Core version 3.9.27 or latest
References
https://developer.joomla.org/security-centre/853-20210502-core-csrf-in-ajax-reordering-endpoint.html
Related Vulnerabilities
OpenSSL Cryptographic Issues Vulnerability (CVE-2013-6450)
SharePoint Improper Input Validation Vulnerability (CVE-2011-1989)
PostgreSQL Other Vulnerability (CVE-2002-0972)
Apache Tomcat Improper Authorization Vulnerability (CVE-2026-43515)
MediaWiki Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2008-1318)