Description
Drupal Core is prone to multiple vulnerabilities, including cross-site scripting, security bypass and denial of service vulnerabilities. Exploiting these issues could allow an attacker to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site, allowing the attacker to steal cookie-based authentication credentials and launch other attacks, to perform otherwise restricted actions and subsequently gain access to private files or to cause the affected website to consume memory and CPU resources, thus denying service to legitimate users. Drupal Core versions 7.x ranging from 7.0 and up to and including 7.28 are vulnerable.
Remediation
Update to Drupal Core version 7.29 or latest
References
Related Vulnerabilities
WordPress Plugin Twitter Cards Meta Multiple Vulnerabilities (2.4.5)
WordPress Plugin WP Symposium Toolbar Unspecified Vulnerability (0.26.0)
WordPress Cryptographic Issues Vulnerability (CVE-2013-2173)
WordPress Plugin WP HTML Author Bio Cross-Site Scripting (1.2.0)
PHP Permissions, Privileges, and Access Controls Vulnerability (CVE-2011-4718)