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Critical · 9.8 Public exploit CVE-2026-15748 EUVD-2026-60569GHSA-3p88-69p6-f6mj

Forminator Forms <= 1.56.1 - Unauthenticated Arbitrary File Upload via Forged Upload Field Configuration

Published Aug 18, 2026 · Updated Aug 18, 2026 · Assigned by Wordfence

Vendor: WPMU DEV Product: Forminator Forms – Contact Form, Payment Form & Custom Form Builder Category: Web / CMS

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.

Affected products

VendorProductAffectedFixed
wpmudev Forminator Forms – Contact Form, Payment Form & Custom Form Builder ≤ 1.56.1 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 3 repositories

  • yora1928/cve-2026-15748 ★ 3 · Aug 18, 2026

    CVE-2026-15748 - Unauthenticated RCE exploit for WordPress Forminator plugin (≤1.56.1). Automated detection, deep crawl, nonce extraction, and safe upload test. For authorized testing only.

  • 0x4cr/CVE-2026-15748 ★ 0 · Oct 11, 2026

    Unauthenticated RCE in WordPress Forminator Forms <= 1.56.1 (CVSS 9.8)

  • ubaydev/CVE-2026-15748 ★ 0 · Aug 19, 2026

    Forminator Forms <= 1.56.1 - Unauthenticated Arbitrary File Upload via Forged Upload Field Configuration

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

References