CVE-2026-1782 | Wpmet MetForm Pro Plugin up to 3.9.7 on WordPress Form Submission mf-calculation input validation

VDB-357674 · CVE-2026-1782 · GCVE-0-2026-1782 WPMET METFORM PRO PLUGIN UP TO 3.9.7 ON WORDPRESS FORM SUBMISSION MF-CALCULATION INPUT VALIDATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.2 $0-$5k 2.61+ Summaryinfo A vulnerability, which was classified as critical, was found in Wpmet MetForm Pro Plugin up to 3.9.7 on WordPress. This impacts an unknown function of the component Form Submission Handler. Such manipulation of the argument mf-calculation leads to input validation. This vulnerability is traded as CVE-2026-1782. The attack may be launched remotely. There is no exploit available. Detailsinfo A vulnerability was found in Wpmet MetForm Pro Plugin up to 3.9.7 on WordPress and classified as critical. Affected by this issue is some unknown functionality of the component Form Submission Handler. The manipulation of the argument mf-calculation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. CVE summarizes: 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. The weakness was shared by Andrea Bocchetti. The advisory is available at wordfence.com. This vulnerability is handled as CVE-2026-1782 since 02/02/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 04/15/2026). There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Type WordPress Plugin Vendor Wpmet Name MetForm Pro Plugin Version 3.9.0 3.9.1 3.9.2 3.9.3 3.9.4 3.9.5 3.9.6 3.9.7 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.3 VulDB Meta Temp Score: 6.2 VulDB Base Score: 7.3 VulDB Temp Score: 7.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 5.3 CNA Vector (Wordfence): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Input validation CWE: CWE-20 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 02/02/2026 CVE reserved 04/15/2026 +71 days Advisory disclosed 04/15/2026 +0 days VulDB entry created 04/15/2026 +0 days VulDB entry last update Sourcesinfo Advisory: wordfence.com Researcher: Andrea Bocchetti Status: Not defined CVE: CVE-2026-1782 (🔒) GCVE (CVE): GCVE-0-2026-1782 GCVE (VulDB): GCVE-100-357674 Entryinfo Created: 04/15/2026 11:42 Changes: 04/15/2026 11:42 (65) Complete: 🔍 Cache ID: 99:1E6:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸