CVE-2026-3461 Visa Acceptance Solutions <= 2.1.0 - Unauthenticated Authentication Bypass via Billing Email
Unauthenticated attackers can bypass authentication and take over any user account, including administrators, by supplying a target email address during guest checkout.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3461?
CVE-2026-3461 is a critical authentication bypass vulnerability in visaacceptancesolutions Visa Acceptance Solutions, published on 15 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-288
Which versions are affected by CVE-2026-3461?
How do I fix CVE-2026-3461?
No fix has been published for CVE-2026-3461 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-3461 being exploited?
There is no known exploitation of CVE-2026-3461 in the wild and no public exploit code.
Sources
Also known as GHSA-f5vm-4j2m-phc2.