Skip to main content

Forminator Forms CVE-2026-15748

| EUVDEUVD-2026-60569 CRITICAL
Unrestricted Upload of File with Dangerous Type (CWE-434)
2026-08-18 Wordfence GHSA-3p88-69p6-f6mj
9.8
CVSS 3.1 · Vendor: Wordfence
Share

Severity by source

Vendor (Wordfence) PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
9.8 CRITICAL

Unauthenticated network submission handler (AV:N/PR:N/UI:N) with a straightforward blocklist bypass (AC:L) yielding code execution, giving full C/I/A impact on the host.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (Wordfence).

CVSS VectorVendor: Wordfence

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Aug 18, 2026 - 06:16 vuln.today
CVE Published
Aug 18, 2026 - 05:31 cve.org
CRITICAL 9.8

DescriptionCVE.org

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.

AnalysisAI

Unauthenticated arbitrary file upload leading to remote code execution affects the Forminator Forms WordPress plugin (WPMU DEV) in all versions through 1.56.1. The public form-submission handler trusts attacker-controlled upload field configuration injected through a forged Select field value, and the dangerous-extension blocklist in handle_file_upload uses exact-key matching that is bypassed with pipe-alternative MIME type keys, letting an attacker drop an executable PHP file on the server. …

Unlock full vulnerability intelligence

  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
  • Personal watchlist & email alerts

Free forever · No credit card required

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
technique details hidden
Exploit
technique details hidden
Execution
technique details hidden
Persist
technique details hidden
Impact
technique details hidden

Vulnerability AssessmentAI

Exploitation Exploitation requires that the target WordPress site runs Forminator Forms ≤1.56.1 with at least one publicly reachable form (default deployment for a plugin whose purpose is public contact/payment forms). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a genuine top-priority issue, not a high-CVSS-but-low-real-risk case. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade Forminator Forms to the first release above 1.56.1 that the vendor marks as fixed; the input data does not include an exact patched version number, so the released patched version is not independently confirmed and administrators should verify the fixed release on the WordPress.org plugin page before deploying. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Identify all WordPress installations running Forminator Forms and immediately disable file upload functionality in all active forms via the plugin settings. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

Share

CVE-2026-15748 vulnerability details – vuln.today

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy