Vulnerability Details CVE-2009-4142
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.174
EPSS Ranking 94.8%
CVSS Severity
CVSS v2 Score 4.3
Products affected by CVE-2009-4142