Vulnerability 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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/admin/classes/
- https://plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/library/abstra
- https://plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/library/fields
- https://plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/library/helper
- https://plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/library/module
- https://plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/library/module
- https://www.wordfence.com/threat-intel/vulnerabilities/id/263ac05d-f1ca-46e3-a43
FAQ
What is CVE-2026-15748?
CVE-2026-15748 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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...
How severe is CVE-2026-15748?
CVE-2026-15748 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-15748?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.