Vulnerability Description
The Formidable Forms plugin for WordPress is vulnerable to a payment integrity bypass in all versions up to, and including, 6.28. This is due to the Stripe Link return handler (`handle_one_time_stripe_link_return_url`) marking payment records as complete based solely on the Stripe PaymentIntent status without comparing the intent's charged amount against the expected payment amount, and the `verify_intent()` function validating only client secret ownership without binding intents to specific forms or actions. This makes it possible for unauthenticated attackers to reuse a PaymentIntent from a completed low-value payment to mark a high-value payment as complete, effectively bypassing payment for goods or services.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/formidable/tags/6.28/stripe/controlle
- https://plugins.trac.wordpress.org/browser/formidable/tags/6.28/stripe/controlle
- https://plugins.trac.wordpress.org/browser/formidable/tags/6.28/stripe/controlle
- https://www.wordfence.com/threat-intel/vulnerabilities/id/ebb4bc5a-9469-4733-acf
FAQ
What is CVE-2026-2890?
CVE-2026-2890 is a vulnerability with a CVSS score of 7.5 (HIGH). The Formidable Forms plugin for WordPress is vulnerable to a payment integrity bypass in all versions up to, and including, 6.28. This is due to the Stripe Link return handler (`handle_one_time_stripe...
How severe is CVE-2026-2890?
CVE-2026-2890 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-2890?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.