Description
The Forminator Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.56.1 via the handle_file_upload function. This is due to insufficient file type validation in handle_file_upload, where the dangerous-extension blocklist performs exact-key matching that is bypassed by pipe-alternative MIME type keys, combined with a public submission handler that trusts attacker-controlled upload field configuration injected via a forged Select field value. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible.
References7
- plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/admin…
- plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/libra…
- plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/libra…
- plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/libra…
- plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/libra…
- plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/libra…
- www.wordfence.com/threat-intel/vulnerabilities/id/263ac05d-f1ca…
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 4% percentile: 91 · as of 11 November 2026
- CWE
- CWE-434
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.