CVE-2009-4142
MEDIUM · CVSS 4.3EPSS 6.5%EU EUVD
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.
Key facts
- CVSS score
- 4.3 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:M/Au:N/C:N/I:P/A:N- Weakness (CWE)
- CWE-79
- EPSS score
- 6.5% (94th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-4112)
- Published
- December 21, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-4112 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
and 61 more…
References
- http://bugs.php.net/bug.php?id=49785
- http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html
- http://marc.info/?l=bugtraq&m=127680701405735&w=2
- http://secunia.com/advisories/37821(Vendor Advisory)
- http://secunia.com/advisories/38648
- http://secunia.com/advisories/40262
- http://securitytracker.com/id?1023372(Exploit)
- http://support.apple.com/kb/HT4077
- http://www.debian.org/security/2010/dsa-2001
- http://www.php.net/ChangeLog-5.php(Patch)
- http://www.php.net/releases/5_2_12.php
- http://www.securityfocus.com/bid/37389(Exploit)
- http://www.vupen.com/english/advisories/2009/3593(Vendor Advisory)
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10005
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7085
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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