{
    "id": "CVE-2011-4885",
    "published": "2011-12-30 01:55:01",
    "last_modified": "2026-06-16 23:35:34",
    "cvss_score": "5.0",
    "cvss_severity": "MEDIUM",
    "cvss_version": "2.0",
    "cvss_vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
    "cwe": "CWE-20",
    "description": "PHP before 5.3.9 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.",
    "epss_score": "0.83370",
    "epss_percentile": "0.99672",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-26 18:18:13",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "php",
            "product": "php"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "18305",
            "title": "PHP Hash Table Collision - Denial of Service (PoC)",
            "date": "2012-01-03",
            "url": "https://www.exploit-db.com/exploits/18305"
        },
        {
            "source": "exploit-db",
            "ref_id": "18296",
            "title": "PHP 5.3.8 - Hashtables Denial of Service",
            "date": "2012-01-01",
            "url": "https://www.exploit-db.com/exploits/18296"
        },
        {
            "source": "exploit-db",
            "ref_id": "2012",
            "title": "MyBulletinBoard (MyBB) 1.1.5 - 'CLIENT-IP' SQL Injection",
            "date": "2006-07-15",
            "url": "https://www.exploit-db.com/exploits/2012"
        }
    ],
    "refs_list": [
        "http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html",
        "http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041",
        "http://lists.apple.com/archives/security-announce/2012/May/msg00001.html",
        "http://lists.opensuse.org/opensuse-security-announce/2012-03/msg00013.html",
        "http://lists.opensuse.org/opensuse-security-announce/2012-03/msg00016.html",
        "http://marc.info/?l=bugtraq&m=132871655717248&w=2",
        "http://marc.info/?l=bugtraq&m=133469208622507&w=2",
        "http://rhn.redhat.com/errata/RHSA-2012-0071.html",
        "http://secunia.com/advisories/47404",
        "http://secunia.com/advisories/48668",
        "http://support.apple.com/kb/HT5281",
        "http://svn.php.net/viewvc?view=revision&revision=321003",
        "http://svn.php.net/viewvc?view=revision&revision=321040",
        "http://www.debian.org/security/2012/dsa-2399",
        "http://www.exploit-db.com/exploits/18296",
        "http://www.exploit-db.com/exploits/18305",
        "http://www.kb.cert.org/vuls/id/903934",
        "http://www.mandriva.com/security/advisories?name=MDVSA-2011:197",
        "http://www.mandriva.com/security/advisories?name=MDVSA-2013:150",
        "http://www.nruns.com/_downloads/advisory28122011.pdf",
        "http://www.ocert.org/advisories/ocert-2011-003.html",
        "http://www.oracle.com/technetwork/topics/security/cpujul2012-392727.html",
        "http://www.redhat.com/support/errata/RHSA-2012-0019.html",
        "http://www.securityfocus.com/bid/51193",
        "http://www.securitytracker.com/id?1026473"
    ]
}