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NVD CRITICAL: CVE-2026-15748 — The Forminator Forms plugin for WordPress is vulnerable to Arbitrary File Upload...

·Source: NIST NVD

Updated:

Executive Summary

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 th

Analysis

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: 9.8. Published: 2026-08-18T06:16:40.670.

Indicators of Compromise (1)

CVE (1)
CVE-2026-15748
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Aug 18, 2026. Verified by: NIST.

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