Unrestricted file upload in glenwpcoder Drag and Drop Multiple File Upload for Contact…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-434.
Summary
The Drag and Drop Multiple File Upload for Contact Form 7 plugin for WordPress is vulnerable to arbitrary file upload in versions up to, and including, 1.3.9.7. This is due to insufficient file type validation that occurs when custom blacklist types are configured, which replaces the default dangerous extension denylist instead of merging with it, and the wpcf7_antiscript_file_name() sanitization function being bypassed for filenames containing non-ASCII characters. This makes it possible for unauthenticated attackers to upload arbitrary files, such as PHP files, to the server, which can be leveraged to achieve remote code execution. The vulnerability was originally reported by Leonid Semenenko (lsemenenko) and partially patched in version 1.3.9.7. A bypass for the patch was separately discovered and reported by Nguyen Hung (Mitchell).
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| glenwpcoder | Drag and Drop Multiple File Upload for Contact Form 7 | up to 1.3.9.7 | — | No fix listed | CNA |
- Drag and Drop Multiple File Upload for Contact Form 7 Vendorglenwpcoder Affected up to 1.3.9.7 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-5718
- 2026-10-03 Alias added: GHSA-xj7v-jqv6-v48w
- 2026-10-25 EPSS moved to the 90th–95th percentile
References
Other 7
- https://www.wordfence.com/threat-intel/vulnerabilities/id/38f95d40-a6d4-429c-9872-9d2531e942eb?source=cve
- https://plugins.trac.wordpress.org/browser/drag-and-drop-multiple-file-upload-contact-form-7/tags/1.3.9.6/inc/dnd-upload-cf7.php#L987
- https://plugins.trac.wordpress.org/browser/drag-and-drop-multiple-file-upload-contact-form-7/tags/1.3.9.6/inc/dnd-upload-cf7.php#L883
- https://plugins.trac.wordpress.org/browser/drag-and-drop-multiple-file-upload-contact-form-7/tags/1.3.9.6/inc/dnd-upload-cf7.php#L970
- https://plugins.trac.wordpress.org/browser/drag-and-drop-multiple-file-upload-contact-form-7/tags/1.3.9.6/inc/dnd-upload-cf7.php#L62
- https://plugins.trac.wordpress.org/changeset/3508522/drag-and-drop-multiple-file-upload-contact-form-7
- https://plugins.trac.wordpress.org/changeset/3548901/
More glenwpcoder vulnerabilities
- TI-2020-10177 The drag-and-drop-multiple-file-upload-contact-form-7 plugin before 1.3.3.3 for WordPress… CVSS 3.1CRITICAL 9.8
- TI-2023-01052 Drag and Drop Multiple File Upload Contact Form 7 admin-ajax.php path traversal CVSS 3.1CRITICAL 9.8
- TI-2023-01210 Drag and Drop Multiple File Upload PRO - Reflected Cross-Site Scripting CVSS 3.1MEDIUM 6.1
- TI-2023-04438 Drag and Drop Multiple File Upload < 1.1.1 - Unauthenticated Stored Cross-Site Scripting CVSS 3.1MEDIUM 5.4
- TI-2025-03925 Drag and Drop Multiple File Upload for WooCommerce <= 1.1.6 - Unauthenticated Arbitrary File Upload via upload Function CVSS 3.1CRITICAL 9.8
- TI-2022-03032 Drag and Drop Multiple File Upload < 1.3.6.5 - File Upload Size Limit Bypass CVSS 3.1MEDIUM 4.3
Sources
- CVE-2026-5718 · CVE Program
- CVE-2026-5718 · NVD
- FIRST EPSS
- GHSA-xj7v-jqv6-v48w · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences