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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
References 7
https://plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/admin/classes…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/library/abstr…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/library/field…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/library/helpe…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/library/modul…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/library/modul…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/263ac05d-f1ca-46e3-a4…
security@wordfence.com