Description
Joomla! Core is prone to a local file inclusion vulnerability because it fails to sufficiently verify user-supplied input. Exploiting this issue may allow an attacker to obtain sensitive information that could aid in further attacks. Joomla! Core versions ranging from 2.5.0 and up to and including 3.8.8 are vulnerable.
Remediation
Update to Joomla! Core version 3.8.9 or latest
References
Related Vulnerabilities
concrete5 Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2014-5107)
WordPress Plugin Multi Step Form Multiple Cross-Site Scripting Vulnerabilities (1.2.5)
Joomla! Core PHP Object Injection (2.5.4 - 3.8.12)
WordPress Plugin Modula Image Gallery Cross-Site Scripting (2.2.4)