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{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-1782", "lastModified": "2026-04-22T20:23:16.350", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security@wordfence.com", "type": "Primary"}]}, "published": "2026-04-15T09:16:31.213", "references": [{"source": "security@wordfence.com", "url": "https://wpmet.com/plugin/metform/"}, {"source": "security@wordfence.com", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/a49dd64b-6ae8-49ed-9e8a-e5b73c2acf4b?source=cve"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "security@wordfence.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "unaffected", "versions": null}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "wordpress", "vendor": "wordpress"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.9.7]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "MetForm Pro", "source": "cna", "vendor": "Wpmet"}, "product": "metform_pro", "vendor": "wpmet"}], "analysis": {"en": {"generated_at": "2026-04-15T10:23:09.666278+00:00", "value": {"mitigation_remediation": ["Update MetForm Pro to version 3.9.8 or newer, which removes the input\u2011validation issue.", "If an immediate upgrade is not possible, modify the form to eliminate the public 'mf-calculation' field or convert it to a hidden field that does not receive client\u2011side input.", "Reconfigure the payment integrations (Stripe/PayPal) to validate the transaction amount against the server\u2011defined price, rejecting any mismatches with the user\u2011submitted value."], "summary": {"action": "Patch", "impact": "Payment amount manipulation"}, "threat_synthesis": {"affected_systems": "The vulnerability impacts the Wpmet MetForm Pro plugin versions up to and including 3.9.7. The issue exists only when a form is configured with the specific payment integration settings that trust the 'mf-calculation' field.", "description_and_impact": "MetForm Pro, a WordPress plugin, has an improper input validation flaw affecting all releases up to 3.9.7. The flaw allows attackers to manipulate the payment amount by submitting a crafted 'mf-calculation' field in a form REST request. As a result, unauthenticated attackers can trigger transactions for amounts of their choosing, potentially causing financial loss and fraud.", "risk_and_exploitability": "The CVSS score is 5.3, indicating medium severity. EPSS data is not available, and the vulnerability is not listed in the KEV catalog. Attackers must be able to submit a form that includes the vulnerable configuration, but the attack is unauthenticated and can be performed remotely via the REST endpoint. Because the flaw requires a particular form setup, the exploitable surface is limited but still presents a realistic risk in sites that use the vulnerable plugin configuration."}}}}, "created": "2026-04-15T13:44:47.518083+00:00", "updated": "2026-04-15T13:49:14.862128+00:00", "vendors": ["wordpress", "wordpress$PRODUCT$wordpress", "wpmet", "wpmet$PRODUCT$metform_pro"]}