CVE-2026-18781: CWE-94 Improper Control of Generation of Code ('Code Injection') in Drag and Drop Multiple File Upload for Contact Form 7
Description
CVE-2026-18781 is a high severity vulnerability in the Drag and Drop Multiple File Upload for Contact Form 7 WordPress plugin before version 1.3.9.9. The flaw allows unauthenticated users to bypass file type restrictions by exploiting improper validation of uploaded file names after character stripping. This can lead to arbitrary code execution on the server.
CVSS v3.1
Score 8.1high
Affected software
Drag and Drop Multiple File Upload for Contact Form 7
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Drag and Drop Multiple File Upload for Contact Form 7 WordPress plugin versions prior to 1.3.9.9 do not properly validate the final name of uploaded files after removing certain characters. This improper control of code generation (CWE-94) enables unauthenticated attackers to bypass file type restrictions and execute arbitrary code on the server, potentially compromising confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows unauthenticated attackers to execute arbitrary code on the affected server, leading to full compromise of the system, including potential data theft, modification, or service disruption.
Mitigation Recommendations
A fix is available in version 1.3.9.9 of the Drag and Drop Multiple File Upload for Contact Form 7 plugin. Users should upgrade to this version or later to remediate the vulnerability. No vendor advisory was provided, so patch status is inferred from the version information in the description.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-08-04T08:02:58.759Z
- State
- PUBLISHED
Threat ID: 6a87eebfacd9273b49b49ec1
Added to database: 08/21/2026, 06:22:55 UTC
Last enriched: 09/10/2026, 19:02:01 UTC
Last updated: 10/05/2026, 06:48:14 UTC
Views: 134
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