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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 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.

    Published:Sep 27, 2009
    Last Modified:Apr 11, 2025
    EPS:Nov 12, 2010
    EPSS Score:0.02127
    CVSS Score:6.8

    Affected Products

    Vendor
    Php
    Product
    Php
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    http://bugs.php.net/bug.php?id=49687http://sirdarckcat.blogspot.com/2009/10/couple-of-unicode-issues-on-php-and.htmlhttp://www.blackhat.com/presentations/bh-usa-09/VELANAVA/BHUSA09-VelaNava-FavoriteXSS-SLIDES.pdfhttp://bugs.php.net/bug.php?id=49687http://sirdarckcat.blogspot.com/2009/10/couple-of-unicode-issues-on-php-and.htmlhttp://www.blackhat.com/presentations/bh-usa-09/VELANAVA/BHUSA09-VelaNava-FavoriteXSS-SLIDES.pdf

    Related CVEs

    CVE-2026-14355 (CVSS 5.6) — In PHP versions 8.2.* before 8.2.32, 8.3.* before 8.3.32, 8.4.* before 8.4.23, 8.5.* before 8.5.8, the AES-WRA…
    CVE-2026-7263 (CVSS 6.3) — In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, DOMNode::C14N() method may process the XML data in…
    CVE-2026-6104 (CVSS 6.3) — In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, when an encoding name containing an embedded NUL b…
    CVE-2026-7258 (CVSS 6.3) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, some fu…
    CVE-2026-6722 (CVSS 9.5) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, the SOA…
    CVE-2026-7259 (CVSS 2.1) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, a misma…
    CVE-2026-7261 (CVSS 6.3) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, when So…
    CVE-2026-7262 (CVSS 2.9) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, when a …
    CVE-2025-14179 (CVSS 7.4) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, the PDO…
    CVE-2026-7568 (CVSS 6.3) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, the met…

    References

    http://bugs.php.net/bug.php?id=49687
    http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052836.html
    http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052845.html
    http://secunia.com/advisories/42410
    http://secunia.com/advisories/42812
    http://sirdarckcat.blogspot.com/2009/10/couple-of-unicode-issues-on-php-and.html
    http://www.blackhat.com/presentations/bh-usa-09/VELANAVA/BHUSA09-VelaNava-FavoriteXSS-SLIDES.pdf
    http://www.redhat.com/support/errata/RHSA-2010-0919.html
    http://www.redhat.com/support/errata/RHSA-2011-0195.html
    http://www.securityfocus.com/bid/44889
    http://www.ubuntu.com/usn/USN-1042-1
    http://www.vupen.com/english/advisories/2010/3081
    http://www.vupen.com/english/advisories/2011/0020
    http://www.vupen.com/english/advisories/2011/0021
    http://www.vupen.com/english/advisories/2011/0077
    http://bugs.php.net/bug.php?id=49687
    http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052836.html
    http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052845.html
    http://secunia.com/advisories/42410
    http://secunia.com/advisories/42812
    http://sirdarckcat.blogspot.com/2009/10/couple-of-unicode-issues-on-php-and.html
    http://www.blackhat.com/presentations/bh-usa-09/VELANAVA/BHUSA09-VelaNava-FavoriteXSS-SLIDES.pdf
    http://www.redhat.com/support/errata/RHSA-2010-0919.html
    http://www.redhat.com/support/errata/RHSA-2011-0195.html
    http://www.securityfocus.com/bid/44889
    http://www.ubuntu.com/usn/USN-1042-1
    http://www.vupen.com/english/advisories/2010/3081
    http://www.vupen.com/english/advisories/2011/0020
    http://www.vupen.com/english/advisories/2011/0021
    http://www.vupen.com/english/advisories/2011/0077

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High