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 3.x.x ranging from 3.0.0 and up to and including 3.9.23 are vulnerable.
Remediation
Update to Joomla! Core version 3.9.24 or latest
References
https://developer.joomla.org/security-centre/836-20210101-core-com-modules-exposes-module-names.html
Related Vulnerabilities
Import and export users and customers Multiple Vulnerabilities (1.9.4.6)
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WordPress Improper Access Control Vulnerability (CVE-2015-5623)
MDC YouTube Downloader Local File Inclusion (2.1.0)
Moodle Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2014-7833)