{
    "id": "CVE-2004-0189",
    "published": "2004-03-15 05:00:00",
    "last_modified": "2026-06-16 22:05:07",
    "cvss_score": "7.5",
    "cvss_severity": "HIGH",
    "cvss_version": "2.0",
    "cvss_vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
    "cwe": null,
    "description": "The \"%xx\" URL decoding function in Squid 2.5STABLE4 and earlier allows remote attackers to bypass url_regex ACLs via a URL with a NULL (\"%00\") character, which causes Squid to use only a portion of the requested URL when comparing it against the access control lists.",
    "epss_score": "0.13807",
    "epss_percentile": "0.96412",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-10-02 18:17:04",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "squid",
            "product": "squid"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "23777",
            "title": "Squid Proxy 2.4/2.5 - NULL URL Character Unauthorized Access",
            "date": "2004-03-01",
            "url": "https://www.exploit-db.com/exploits/23777"
        }
    ],
    "refs_list": [
        "ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.16/SCOSA-2005.16.txt",
        "ftp://patches.sgi.com/support/free/security/advisories/20040404-01-U.asc",
        "http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000838",
        "http://marc.info/?l=bugtraq&m=108084935904110&w=2",
        "http://security.gentoo.org/glsa/glsa-200403-11.xml",
        "http://www.debian.org/security/2004/dsa-474",
        "http://www.mandrakesoft.com/security/advisories?name=MDKSA-2004:025",
        "http://www.osvdb.org/5916",
        "http://www.redhat.com/support/errata/RHSA-2004-133.html",
        "http://www.redhat.com/support/errata/RHSA-2004-134.html",
        "http://www.securityfocus.com/bid/9778",
        "http://www.squid-cache.org/Advisories/SQUID-2004_1.txt",
        "https://exchange.xforce.ibmcloud.com/vulnerabilities/15366",
        "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A877",
        "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A941",
        "ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.16/SCOSA-2005.16.txt",
        "ftp://patches.sgi.com/support/free/security/advisories/20040404-01-U.asc",
        "http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000838",
        "http://marc.info/?l=bugtraq&m=108084935904110&w=2",
        "http://security.gentoo.org/glsa/glsa-200403-11.xml",
        "http://www.debian.org/security/2004/dsa-474",
        "http://www.mandrakesoft.com/security/advisories?name=MDKSA-2004:025",
        "http://www.osvdb.org/5916",
        "http://www.redhat.com/support/errata/RHSA-2004-133.html",
        "http://www.redhat.com/support/errata/RHSA-2004-134.html"
    ]
}