What’s Vulnerable › Vulnerabilities

CVE-2026-3461: Visa Acceptance Solutions <= 2.1.0 - Unauthenticated Authentication Bypass via Billing Email

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-15 · updated 2026-06-17
• Weakness: CWE-288

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.

Affected products

• visaacceptancesolutions Visa Acceptance Solutions: through 2.1.0

References

• https://plugins.trac.wordpress.org/browser/visa-acceptance-solutions/tags/2.1.0/public/class-visa-acceptance-payment-gateway-expresspay-public.php#L777
• https://plugins.trac.wordpress.org/browser/visa-acceptance-solutions/tags/2.1.0/public/class-visa-acceptance-payment-gateway-expresspay-public.php#L790
• https://plugins.trac.wordpress.org/browser/visa-acceptance-solutions/trunk/public/class-visa-acceptance-payment-gateway-expresspay-public.php#L777
• https://plugins.trac.wordpress.org/browser/visa-acceptance-solutions/trunk/public/class-visa-acceptance-payment-gateway-expresspay-public.php#L790
• https://www.wordfence.com/threat-intel/vulnerabilities/id/8d3aea10-d7a0-44bd-94dc-3bad0d27dbd8?source=cve

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