CVE-2009-4142 in PHP

Summary

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.

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• Reservation: 12/01/2009
• Disclosure: 12/21/2009
• Moderation: VulDB entry created
• Entries: 1: VDB-51226
• CPE: ready
• CWE: CWE-79 (Confirmed)
• Exploit: Download
• CVSS: 4.3
• EPSS: 0.16946
• Activities: Very Low

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2009-4142
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-4142
• CVE Details: https://www.cvedetails.com/cve/CVE-2009-4142/