Low severity · published Oct 3, 2026
CVE-2026-86834
MetForm 2.2.1 - 4.3.0 - Unauthenticated Debug File Disclosure via HubSpot Forms Integration
3.7
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ME
MetForm ·
2.2.1 before 4.3.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-86834
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-86834
exploit
https://wpscan.com/vulnerability/a56b7e26-9070-4c38-bdc1-7289b5829638/
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