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CVE-2009-5016
Integer overflow in the xml_utf8_decode function in ext/xml/xml.c in PHP before 5.2.11 makes it easier for remote attackers to bypass…
- 6.8MediumCVSS base score
- 2.7%Exploitation in 30 daysEPSS · top 14% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Integer overflow in the xml_utf8_decode function in ext/xml/xml.c in PHP before 5.2.11 makes it easier for remote attackers to bypass cross-site scripting (XSS) and SQL injection protection mechanisms via a crafted string that uses overlong UTF-8 encoding, a different vulnerability than CVE-2010-3870.
Timeline
ID reserved
By mitre
Published
- 14 years later
· 14 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 2.7% · top 14% of all CVEs (11 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.8.
Affected products
n/a
- affected n/a
References
References15
- ADV-2011-0077 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 44889 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- FEDORA-2010-19011 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- 42812 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- RHSA-2011:0195 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- http://bugs.php.net/bug.php?id=49687 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.blackhat.com/presentations/bh-usa-09/VELANAVA/BHUSA09-VelaNava-FavoriteXSS-SLIDES.pdf (opens in a new tab)x_refsource_MISCx_transferred
- USN-1042-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- RHSA-2010:0919 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- ADV-2011-0021 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- http://sirdarckcat.blogspot.com/2009/10/couple-of-unicode-issues-on-php-and.html (opens in a new tab)x_refsource_MISCx_transferred
- 42410 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- FEDORA-2010-18976 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- ADV-2011-0020 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- ADV-2010-3081 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2009-4974 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2009-5016)Record last updated .