CVE-2026-15748: CWE-434 Unrestricted Upload of File with Dangerous Type in wpmudev Forminator Forms – Contact Form, Payment Form & Custom Form Builder
Forminator Forms plugin for WordPress versions up to and including 1.56.1 contains an arbitrary file upload vulnerability due to insufficient file type validation. This flaw allows unauthenticated attackers to upload potentially executable files, enabling remote code execution.
AI Analysis
Technical Summary
The Forminator Forms plugin for WordPress is vulnerable to arbitrary file upload in all versions up to 1.56.1 via the handle_file_upload function. The vulnerability arises from insufficient validation of file types, where the dangerous-extension blocklist uses exact-key matching that can be bypassed by pipe-alternative MIME type keys. Additionally, a public submission handler trusts attacker-controlled upload field configuration injected through a forged Select field value. This combination permits unauthenticated attackers to upload files that may be executable, potentially leading to remote code execution.
Potential Impact
An unauthenticated attacker can exploit this vulnerability to upload arbitrary files, including executable ones, to the affected system. This can lead to remote code execution, compromising the confidentiality, integrity, and availability of the affected WordPress site.
Mitigation Recommendations
No patch or official fix information is provided in the input data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict file upload permissions and monitor for suspicious upload activity where possible.
CVE-2026-15748: CWE-434 Unrestricted Upload of File with Dangerous Type in wpmudev Forminator Forms – Contact Form, Payment Form & Custom Form Builder
Description
Forminator Forms plugin for WordPress versions up to and including 1.56.1 contains an arbitrary file upload vulnerability due to insufficient file type validation. This flaw allows unauthenticated attackers to upload potentially executable files, enabling remote code execution.
CVSS v3.1
Score 9.8critical
Affected software
wpmudev
Forminator Forms – Contact Form, Payment Form & Custom Form Builder
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Forminator Forms plugin for WordPress is vulnerable to arbitrary file upload in all versions up to 1.56.1 via the handle_file_upload function. The vulnerability arises from insufficient validation of file types, where the dangerous-extension blocklist uses exact-key matching that can be bypassed by pipe-alternative MIME type keys. Additionally, a public submission handler trusts attacker-controlled upload field configuration injected through a forged Select field value. This combination permits unauthenticated attackers to upload files that may be executable, potentially leading to remote code execution.
Potential Impact
An unauthenticated attacker can exploit this vulnerability to upload arbitrary files, including executable ones, to the affected system. This can lead to remote code execution, compromising the confidentiality, integrity, and availability of the affected WordPress site.
Mitigation Recommendations
No patch or official fix information is provided in the input data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict file upload permissions and monitor for suspicious upload activity where possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-07-14T15:09:34.890Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a83f419bf8831d5394562c0
Added to database: 08/18/2026, 05:56:41 UTC
Last enriched: 09/11/2026, 23:31:42 UTC
Last updated: 10/02/2026, 02:46:03 UTC
Views: 160
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