Description
Joomla! Core is prone to a security bypass vulnerability. Exploiting this issue may allow attackers to perform otherwise restricted actions by escalating their privileges. Joomla! Core versions 2.5.x ranging from 2.5.0 and up to and including 2.5.4 are vulnerable.
Remediation
Update to Joomla! Core version 2.5.5 or latest
References
Related Vulnerabilities
WordPress Plugin Name Directory Cross-Site Scripting (1.7.6)
WordPress Plugin SlideDeck 2 Lite Responsive Content Slider Local/Remote File Inclusion (2.3.3)
WordPress Plugin Display Widgets Spam Links Injection (2.6.3.1)
OpenSSL Cryptographic Issues Vulnerability (CVE-2011-4354)
Drupal Incorrect Authorization Vulnerability (CVE-2017-6377)