Description
Joomla! Core is prone to a security bypass vulnerability. Exploiting this issue may allow attackers to perform otherwise restricted actions and subsequently bypass ACLs. Joomla! Core versions 3.x.x ranging from 3.1.0 and up to and including 3.8.12 are vulnerable.
Remediation
Update to Joomla! Core version 3.8.13 or latest
References
Related Vulnerabilities
PHP Other Vulnerability (CVE-2006-1990)
Plone CMS Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2021-21336)
PHP Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2015-8393)
WordPress Plugin WordPress Social Stream Information Disclosure (1.6)