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.

CVSS v2.0 NVD

4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N

EPSS

6.50% chance of exploitation in the next 30 days, 94th percentile

Published

2009-12-21

Updated

2024-08-07

ExploitDB entries (2)

• https://www.exploit-db.com/exploits/33415
• https://www.exploit-db.com/exploits/33414

Security advisories

• http://secunia.com/advisories/37821
• http://www.vupen.com/english/advisories/2009/3593
• http://www.php.net/ChangeLog-5.php
• http://www.securityfocus.com/bid/37389

References

• CVE Record
• NVD entry