{
    "id": "CVE-2007-1521",
    "published": "2007-03-20 20:19:00",
    "last_modified": "2026-06-16 22:37:45",
    "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": null,
    "description": "Double free vulnerability in PHP before 4.4.7, and 5.x before 5.2.2, allows context-dependent attackers to execute arbitrary code by interrupting the session_regenerate_id function, as demonstrated by calling a userspace error handler or triggering a memory limit violation.",
    "epss_score": "0.08489",
    "epss_percentile": "0.94851",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-28 18:17:06",
    "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": "3479",
            "title": "PHP 5.2.1 - 'session_regenerate_id()' Double-Free",
            "date": "2007-03-14",
            "url": "https://www.exploit-db.com/exploits/3479"
        }
    ],
    "refs_list": [
        "http://docs.info.apple.com/article.html?artnum=306172",
        "http://lists.apple.com/archives/security-announce//2007/Jul/msg00004.html",
        "http://secunia.com/advisories/24505",
        "http://secunia.com/advisories/25025",
        "http://secunia.com/advisories/25056",
        "http://secunia.com/advisories/25057",
        "http://secunia.com/advisories/25062",
        "http://secunia.com/advisories/25445",
        "http://secunia.com/advisories/26235",
        "http://security.gentoo.org/glsa/glsa-200705-19.xml",
        "http://us2.php.net/releases/4_4_7.php",
        "http://us2.php.net/releases/5_2_2.php",
        "http://www.debian.org/security/2007/dsa-1282",
        "http://www.debian.org/security/2007/dsa-1283",
        "http://www.novell.com/linux/security/advisories/2007_32_php.html",
        "http://www.php-security.org/MOPB/MOPB-22-2007.html",
        "http://www.securityfocus.com/bid/22968",
        "http://www.securityfocus.com/bid/25159",
        "http://www.ubuntu.com/usn/usn-455-1",
        "http://www.vupen.com/english/advisories/2007/0960",
        "http://www.vupen.com/english/advisories/2007/2732",
        "http://docs.info.apple.com/article.html?artnum=306172",
        "http://lists.apple.com/archives/security-announce//2007/Jul/msg00004.html",
        "http://secunia.com/advisories/24505",
        "http://secunia.com/advisories/25025"
    ]
}