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Case File

CVE-2009-4142

MEDIUM · CVSS 4.3 EPSS 6.50%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2009-12-21 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

CVE
CVE-2009-4142
Severity
MEDIUM
CVSS
4.3
EPSS
6.50%

Original NVD 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.