CVE-2026-86834

MetForm 2.2.1 - 4.3.0 - Unauthenticated Debug File Disclosure via HubSpot Forms Integration

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

MetForm

CVSS v3.1 CNA

3.7 LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS

0.18% chance of exploitation in the next 30 days, 7th percentile

Published

2026-10-03

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/a56b7e26-9070-4c38-bdc1-7289b5829638/

References

• CVE Record
• NVD entry