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
WordPress Plugin Smooth Slider SQL Injection (2.8.6)
Moodle Permissions, Privileges, and Access Controls Vulnerability (CVE-2012-3388)
WebLogic CVE-2018-2893 Vulnerability (CVE-2018-2893)
Jboss EAP CVE-2013-4210 Vulnerability (CVE-2013-4210)
WordPress Plugin Chameleoni Jobs Multiple Cross-Site Scripting Vulnerabilities (1.2.2)