XSS in Php

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.065 (93.0th percentile) — read the EPSS interpretation.

Affected products

  • Php — versions 1.0, 2.0, 2.0b10
  • N/a — versions n/a

Weakness classification (CWE)

References