{
    "id": "CVE-2010-3870",
    "published": "2010-11-12 21:00:02",
    "last_modified": "2026-06-16 23:23:43",
    "cvss_score": "6.8",
    "cvss_severity": "MEDIUM",
    "cvss_version": "2.0",
    "cvss_vector": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
    "cwe": "CWE-20",
    "description": "The utf8_decode function in PHP before 5.3.4 does not properly handle non-shortest form UTF-8 encoding and ill-formed subsequences in UTF-8 data, which makes it easier for remote attackers to bypass cross-site scripting (XSS) and SQL injection protection mechanisms via a crafted string.",
    "epss_score": "0.11281",
    "epss_percentile": "0.95834",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-27 18:17:09",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "canonical",
            "product": "ubuntu_linux"
        },
        {
            "vendor": "php",
            "product": "php"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "34950",
            "title": "PHP 5.3.2 - 'xml_utf8_decode()' UTF-8 Input Validation",
            "date": "2009-05-11",
            "url": "https://www.exploit-db.com/exploits/34950"
        }
    ],
    "refs_list": [
        "http://bugs.php.net/bug.php?id=48230",
        "http://bugs.php.net/bug.php?id=49687",
        "http://lists.apple.com/archives/security-announce/2011/Mar/msg00006.html",
        "http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052836.html",
        "http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052845.html",
        "http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00000.html",
        "http://marc.info/?l=bugtraq&m=133469208622507&w=2",
        "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://support.apple.com/kb/HT4581",
        "http://svn.php.net/viewvc?view=revision&revision=304959",
        "http://us2.php.net/manual/en/function.utf8-decode.php#83935",
        "http://www.acunetix.com/blog/web-security-articles/security-risks-associated-with-utf8_decode/",
        "http://www.blackhat.com/presentations/bh-usa-09/VELANAVA/BHUSA09-VelaNava-FavoriteXSS-SLIDES.pdf",
        "http://www.mandriva.com/en/security/advisories?name=MDVSA-2010:224",
        "http://www.openwall.com/lists/oss-security/2010/11/02/1",
        "http://www.openwall.com/lists/oss-security/2010/11/02/11",
        "http://www.openwall.com/lists/oss-security/2010/11/02/2",
        "http://www.openwall.com/lists/oss-security/2010/11/02/4",
        "http://www.openwall.com/lists/oss-security/2010/11/02/6",
        "http://www.openwall.com/lists/oss-security/2010/11/02/8",
        "http://www.openwall.com/lists/oss-security/2010/11/03/1",
        "http://www.php.net/ChangeLog-5.php",
        "http://www.redhat.com/support/errata/RHSA-2010-0919.html"
    ]
}