CVE-2026-1782 MetForm Pro <= 3.9.7 - Unauthenticated Payment Amount Manipulation via 'mf-calculation'
Unauthenticated attackers can manipulate payment amounts in MetForm Pro by submitting invalid calculation values, bypassing price validation.
- 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-2026-1782?
CVE-2026-1782 is a medium-severity vulnerability in Wpmet MetForm Pro, 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 MetForm Pro plugin for WordPress is vulnerable to Improper Input Validation in all versions up to, and including, 3.9.7 This is due to the payment integrations (Stripe/PayPal) trusting a user-submitted calculation field value without recomputing or validating it against the configured form price. This makes it possible for unauthenticated attackers to manipulate the payment amount via the 'mf-calculation' field in the form submission REST request granted there exists a specific form with this particular configuration.
Weakness: CWE-20
Which versions are affected by CVE-2026-1782?
How do I fix CVE-2026-1782?
No fix has been published for CVE-2026-1782 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-1782 being exploited?
There is no known exploitation of CVE-2026-1782 in the wild and no public exploit code.
Sources
Also known as GHSA-q72v-prr3-m2r8.