What’s Vulnerable › Vulnerabilities
CVE-2026-86834: MetForm 2.2.1 - 4.3.0 - Unauthenticated Debug File Disclosure via HubSpot Forms Integration
- Severity: low (CVSS 3.7 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-03 · updated 2026-10-06
- Weakness: CWE-200
Description
The MetForm WordPress plugin before 4.3.1 does not properly restrict access to a debug file it writes to the web root on every form submission when its HubSpot Forms integration is enabled, allowing unauthenticated attackers to read upstream API response data, including correlation identifiers and cookies.
Affected products
- MetForm: from 2.2.1 before 4.3.1 — fixed in 4.3.1
How to fix
Upgrade to a fixed version: MetForm 4.3.1. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-86834 or the next vulnerability affects your stack