CVE-2026-18351: CWE-434 Unrestricted Upload of File with Dangerous Type in addonsorg Drag and Drop File Upload for Elementor Forms
Description
The Drag and Drop File Upload for Elementor Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.6.0 via the elementor_file_upload function. This is due to insufficient file type validation in the is_file_type_valid() function, which uses the attacker-controlled 'type' parameter as regex keys in the MIME allowlist, allowing blacklist bypass via a crafted extension that sanitize_file_name() later normalizes to a PHP extension. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible.
CVSS v3.1
Score 9.8critical
Affected software
addonsorg
Drag and Drop File Upload for Elementor Forms
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-18351 is a critical vulnerability in the Drag and Drop File Upload for Elementor Forms plugin for WordPress, affecting all versions up to and including 1.6.0. The vulnerability arises from improper validation in the is_file_type_valid() function, which uses an attacker-controlled 'type' parameter as regex keys in the MIME allowlist. This allows attackers to bypass blacklist restrictions by crafting file extensions that are normalized to PHP extensions by sanitize_file_name(), enabling arbitrary file upload and potential remote code execution without authentication.
Potential Impact
Successful exploitation allows unauthenticated attackers to upload arbitrary files, including executable PHP scripts, leading to remote code execution. This compromises the affected WordPress site’s confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict or disable the vulnerable plugin and avoid exposing the file upload functionality to untrusted users.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-07-30T06:01:04.246Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa209f3acd9273b49446591
Added to database: 09/10/2026, 01:37:55 UTC
Last enriched: 09/10/2026, 01:52:06 UTC
Last updated: 10/13/2026, 06:48:15 UTC
Views: 172
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