Description
Joomla! Core is prone to a security bypass vulnerability. Exploiting this issue may allow attackers to bypass intended access restrictions and perform otherwise restricted actions. Joomla! Core versions ranging from 1.5.0 and up to and including 3.8.12 are vulnerable.
Remediation
Update to Joomla! Core version 3.8.13 or latest
References
Related Vulnerabilities
WordPress Plugin 404 to 301-Redirect, Log and Notify 404 Errors Cross-Site Scripting (2.3.0)
Joomla! Core 3.x.x Security Bypass (3.0.0 - 3.9.19)
WordPress 4.2.x Multiple Vulnerabilities (4.2 - 4.2.10)
WordPress Plugin Wonder PDF Embed Cross-Site Scripting (1.6)
PHP Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2018-10545)