Description
The htmlspecialchars function in PHP before 5.2.12 does not properly handle (1) overlong UTF-8 sequences, (2) invalid Shift_JIS sequences, and (3) invalid EUC-JP sequences, which allows remote attackers to conduct cross-site scripting (XSS) attacks by placing a crafted byte sequence before a special character.
Remediation
References
Related Vulnerabilities
WordPress Plugin RSVPMaker SQL Injection (6.1.9)
WordPress Plugin Crowd Ideas Cross-Site Scripting (1.0)
Plone CMS Improper Control of Generation of Code ('Code Injection') Vulnerability (CVE-2012-5488)
MySQL CVE-2017-3318 Vulnerability (CVE-2017-3318)
JBoss Application Server Cross-Site Request Forgery (CSRF) Vulnerability (CVE-2011-3609)