5.3Medium

CVE-2026-1782MetForm Pro <= 3.9.7 - Unauthenticated Payment Amount Manipulation via 'mf-calculation'

Wpmet MetForm Pro Published: 2026-04-15 11:28 (7 months ago)

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): CWE-20

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

Vendor	Product	Versions
Wpmet	MetForm Pro	≤ 3.9.7

References and patches

CVSS score

5.3Medium

Source: Wordfence · CVSS 3.1

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: Low
Availability: None

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

All scores (2)

cna	CVSS 3.1	5.3Medium
security@wordfence.com	CVSS 3.1	5.3Medium

EPSS (chance of exploitation in 30 days)

0.28%

higher than 20% of all CVEs

CISA assessment (SSVC)

Exploitation: none
Automatable: yes
Technical impact: partial

Timeline

ID reserved2026-02-02
Published2026-04-15 11:28
Reached IP-DB2026-10-24 23:42
Last updated2026-06-17 13:16

Assigned by (CNA): Wordfence
NVD status: Deferred

View at source: CVE.org · NVD

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