EUVD-2026-81335
GHSA-h7vp-g8q2-89c8
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Unauthenticated network-reachable chunked upload with weak type validation yields arbitrary file write enabling RCE, so PR:N/UI:N/AC:L and full C/I/A impact.
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
Lifecycle Timeline
2DescriptionCVE.org
The Multi Uploader for Gravity Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.1.9 via the move_file function. This is due to insufficient file type validation during chunked upload handling. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.
Articles & Coverage 1
AnalysisAI
Unauthenticated arbitrary file upload in the Multi Uploader for Gravity Forms WordPress plugin (all versions up to and including 1.1.9) lets attackers write executable files to the affected site's server through the move_file() chunked-upload handler, which applies insufficient file-type validation, making remote code execution possible. Exploitation requires the plugin to be installed and active alongside the commercial Gravity Forms plugin and a publicly reachable form that exposes a multi-uploader field; the CVSS vector (PR:N/UI:N) confirms no authentication or victim interaction is needed, though RCE additionally depends on the uploaded file landing in a web-executable location. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires the Multi Uploader for Gravity Forms plugin (version ≤1.1.9) installed and active, which in turn depends on the commercial Gravity Forms plugin being present. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine high-priority issue. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch was identified at time of analysis: the only code references supplied point to the vulnerable 1.1.9 tag rather than a fixed release, so an exact remediation version cannot be confirmed from the available data - check the plugin's WordPress.org page and the Wordfence advisory (https://www.wordfence.com/threat-intel/vulnerabilities/id/47337bc1-fa3d-470c-9524-859295261017?source=cve) for a corrected build before assuming one exists. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all WordPress instances for Multi Uploader for Gravity Forms versions up to and including 1.1.9 and confirm whether Gravity Forms and any publicly reachable multi-uploader forms are present; if the plugin is not business-critical, deactivate and remove it, and if it must remain, disable public access to forms containing multi-uploader fields, disable those fields where possible, and deploy WAF rules blocking chunked-upload or move_file() requests and executable file extensions. …
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