CVE-2026-1782

MEDIUM

MetForm Pro <= 3.9.7 - Unauthenticated Payment Amount Manipulation via 'mf-calculation'

Title source: cna

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.

References (2)

Core 2

Core References

https://www.wordfence.com/threat-intel/vulnerabilities/id/a49dd64b-6ae8-49ed-9e8a-e5b73c2acf4b?source=cve

https://wpmet.com/plugin/metform/

Scores

CVSS v3 5.3

EPSS 0.0027

EPSS Percentile 18.0%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-20

Status published

Products (1)

Wpmet/MetForm Pro < 3.9.7

Published Apr 15, 2026

Tracked Since Apr 15, 2026