{
    "id": "CVE-2020-12676",
    "published": "2020-10-02 20:15:12",
    "last_modified": "2026-06-17 02:52:07",
    "cvss_score": "9.1",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
    "cwe": "CWE-347",
    "description": "FusionAuth fusionauth-samlv2 0.2.3 allows remote attackers to forge messages and bypass authentication via a SAML assertion that lacks a Signature element, aka a \"Signature exclusion attack\".",
    "epss_score": "0.02906",
    "epss_percentile": "0.86607",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-11 18:17:22",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.1), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "fusionauth",
            "product": "samlv2"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "http://packetstormsecurity.com/files/159454/FusionAuth-SAMLv2-0.2.3-Message-Forging.html",
        "http://seclists.org/fulldisclosure/2020/Oct/1",
        "https://compass-security.com/fileadmin/Research/Advisories/2020-06_CSNC-2020-002_FusionAuth_Signature_Exclusion_Attack.txt",
        "https://github.com/SAMLRaider/SAMLRaider",
        "https://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2012/08/22/BreakingSAML_3.pdf",
        "http://packetstormsecurity.com/files/159454/FusionAuth-SAMLv2-0.2.3-Message-Forging.html",
        "http://seclists.org/fulldisclosure/2020/Oct/1",
        "https://compass-security.com/fileadmin/Research/Advisories/2020-06_CSNC-2020-002_FusionAuth_Signature_Exclusion_Attack.txt",
        "https://github.com/SAMLRaider/SAMLRaider",
        "https://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2012/08/22/BreakingSAML_3.pdf"
    ]
}