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Dossier · Vulnerability

Vulnerability · NVD published 2026-08-18

CVE-2026-15748

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.

Signals

Exploited in the wild
Not on KEVNot in CISA's catalogue as of the last daily pull. Absence is not proof of safety.
EPSS · 30-day forecast
6%Chance of exploitation in the next 30 days, 93th percentile of all CVEs. A forecast; KEV outranks it.
CVSS · NVD · CRITICAL
9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Internet exposure
not stated by sourcesNo exposure census on this CVE's dispatches.

Exploits

3 known · links only

GitHub PoCs · by trust, then stars3

  1. yora1928/cve-2026-15748 ↗Trust ok 100

    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.

    ★ 3 · created 2026-08-18

  2. 0x4cr/CVE-2026-15748 ↗Trust ok 100

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

    ★ 0 · created 2026-10-11

  3. ubaydev/CVE-2026-15748 ↗Trust ok 100

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

    ★ 0 · created 2026-08-19

Fake proof-of-concept repositories have been used to deliver malware to the researchers who run them. The trust verdict is our engine's heuristic over the repository (account age, what it ships, how its stars arrived); it is a reason to read the code first, not a finding about its author.

On the wire

1 dispatch
  1. Forminator WordPress Flaw Can Enable Unauthenticated RCE via Malicious PHP UploadsVULN

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