CVE-2026-87796: CWE-434 Unrestricted Upload of File with Dangerous Type in sh1zen Multi Uploader for Gravity Forms
The Multi Uploader for Gravity Forms WordPress plugin (versions up to 1.1.9) contains an arbitrary file upload vulnerability due to insufficient file type validation during chunked upload handling. This allows unauthenticated attackers to upload files of dangerous types, potentially leading to remote code execution on the affected server.
AI Analysis
Technical Summary
CVE-2026-87796 is an arbitrary file upload vulnerability in the Multi Uploader for Gravity Forms plugin for WordPress, affecting all versions up to and including 1.1.9. The vulnerability arises from inadequate validation of file types during chunked upload processing in the move_file function. This flaw enables unauthenticated attackers to upload arbitrary files to the server, which may facilitate remote code execution.
Potential Impact
Successful exploitation allows unauthenticated attackers to upload arbitrary files, including potentially malicious code, to the affected server. This can lead to full compromise of the web server, including remote code execution, data theft, or site defacement.
Mitigation Recommendations
No patch or official fix information is provided in the available 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 consider disabling the plugin if possible.
CVE-2026-87796: CWE-434 Unrestricted Upload of File with Dangerous Type in sh1zen Multi Uploader for Gravity Forms
Description
The Multi Uploader for Gravity Forms WordPress plugin (versions up to 1.1.9) contains an arbitrary file upload vulnerability due to insufficient file type validation during chunked upload handling. This allows unauthenticated attackers to upload files of dangerous types, potentially leading to remote code execution on the affected server.
CVSS v3.1
Score 9.8critical
Affected software
sh1zen
Multi Uploader for Gravity Forms
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-87796 is an arbitrary file upload vulnerability in the Multi Uploader for Gravity Forms plugin for WordPress, affecting all versions up to and including 1.1.9. The vulnerability arises from inadequate validation of file types during chunked upload processing in the move_file function. This flaw enables unauthenticated attackers to upload arbitrary files to the server, which may facilitate remote code execution.
Potential Impact
Successful exploitation allows unauthenticated attackers to upload arbitrary files, including potentially malicious code, to the affected server. This can lead to full compromise of the web server, including remote code execution, data theft, or site defacement.
Mitigation Recommendations
No patch or official fix information is provided in the available 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 consider disabling the plugin if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-09-09T09:42:04.055Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aab70cc55bf5e2cf5c21aff
Added to database: 09/17/2026, 04:47:08 UTC
Last enriched: 09/17/2026, 05:01:33 UTC
Last updated: 09/17/2026, 05:12:31 UTC
Views: 4
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