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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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Forminator Plugin | — | Update forminator plugin to version 1.56.2, or a newer patched version | Oct 30, 2026 | Aug 17, 2026 |
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