Visa Acceptance Solutions <= 2.1.0 - Unauthenticated Authentication Bypass via Billing Email_CVE-2026-3461

{
    "lastseen": "",
    "description": "The Visa Acceptance Solutions plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 2.1.0. This is due to the `express_pay_product_page_pay_for_order()` function logging users in based solely on a user-supplied billing email address during guest checkout for subscription products, without verifying email ownership, requiring a password, or validating a one-time token. This makes it possible for unauthenticated attackers to log in as any existing user, including administrators, by providing the target user's email address in the billing_details parameter, resulting in complete account takeover and site compromise.",
    "published": "2026-04-15T08:28:15.223Z",
    "modified": "2026-04-15T08:28:15.223Z",
    "type": "cve",
    "title": "Visa Acceptance Solutions <= 2.1.0 - Unauthenticated Authentication Bypass via Billing Email",
    "source": "Wordfence",
    "references": "https://www.wordfence.com/threat-intel/vulnerabilities/id/8d3aea10-d7a0-44bd-94dc-3bad0d27dbd8?source=cve\nhttps://plugins.trac.wordpress.org/browser/visa-acceptance-solutions/tags/2.1.0/public/class-visa-acceptance-payment-gateway-expresspay-public.php#L777\nhttps://plugins.trac.wordpress.org/browser/visa-acceptance-solutions/tags/2.1.0/public/class-visa-acceptance-payment-gateway-expresspay-public.php#L790\nhttps://plugins.trac.wordpress.org/browser/visa-acceptance-solutions/trunk/public/class-visa-acceptance-payment-gateway-expresspay-public.php#L777\nhttps://plugins.trac.wordpress.org/browser/visa-acceptance-solutions/trunk/public/class-visa-acceptance-payment-gateway-expresspay-public.php#L790",
    "id": "CVE-2026-3461",
    "bulletinFamily": "",
    "cwe": [
        "CWE-288"
    ],
    "cvelist": null,
    "sourceData": "visaacceptancesolutions Visa Acceptance Solutions 0",
    "sourceHref": "",
    "cvss": {
        "score": 9.8,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Visa Acceptance Solutions",
    "version": "0",
    "vendor": "visaacceptancesolutions",
    "ai_description": "Unauthenticated attackers can log in as any existing user, including administrators, by providing the target user's email address in the billing_details parameter, resulting in complete account takeover and site compromise.",
    "ai_severity": "Critical",
    "ai_vendor": "Visa Acceptance Solutions",
    "ai_product": "Visa Acceptance Solutions plugin for WordPress",
    "ai_version": "2.1.0",
    "ai_score": 9.8
}