CVE-2026-16734highCWE-862

CVE-2026-16734: high-severity vulnerability in Stripe Payment Forms by WP Full Pay

Stripe Payment Forms by WP Full Pay < 8.5.2 - Unauthenticated Payment Intent Amount Manipulation

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41Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 7.5epss 0.3%
The Stripe Payment Forms by WP Full Pay WordPress plugin before 8.5.2 does not verify that the caller owns the Stripe payment intent referenced by two unauthenticated payment-form AJAX actions, allowing an unauthenticated visitor — using a nonce that is embedded in every public page containing a payment form — to change the amount of a payment intent that the Stripe Payment Forms by WP Full Pay WordPress plugin before 8.5.2 then updates server-side through the Stripe API with the store's secret key. An ownership check added in 8.5.0 was applied to only one payment-intent handler, leaving the pricing-recalculation and payment-intent-update actions unprotected against amount manipulation.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected products
Unknown · Stripe Payment Forms by WP Full Pay
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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