CVE-2026-5581: CWE-862 Missing Authorization in sh1zen Multi Uploader for Gravity Forms
The Multi Uploader for Gravity Forms WordPress plugin up to version 1.1.8 contains a missing authorization vulnerability that allows unauthenticated attackers to delete arbitrary media attachments. This occurs because the deletion function lacks proper capability checks and exposes a nonce on public pages, enabling permanent media library destruction.
AI Analysis
Technical Summary
CVE-2026-5581 is a missing authorization vulnerability (CWE-862) in the Multi Uploader for Gravity Forms plugin for WordPress, affecting all versions up to and including 1.1.8. The vulnerability arises from the `plupload_ajax_delete_file()` function, which is registered via `wp_ajax_nopriv_gfmu_delete_file` and lacks proper capability checks. Although a nonce is used for CSRF protection, it is exposed on any public-facing page containing a multi-uploader form field via the `GFMU_options` JavaScript object. This exposure allows unauthenticated attackers to supply an attachment ID and delete any media file in the WordPress media library permanently.
Potential Impact
An unauthenticated attacker can permanently delete any media attachment in the WordPress media library by exploiting this vulnerability. This can lead to complete destruction of the media library, impacting website content and availability of media assets. The CVSS 3.1 score is 9.1 (critical), reflecting network attack vector, no privileges required, no user interaction, and high impact on 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 access to pages containing the multi-uploader form field or disable the plugin to prevent exploitation. Monitor for updates from the vendor for an official fix.
CVE-2026-5581: CWE-862 Missing Authorization in sh1zen Multi Uploader for Gravity Forms
Description
The Multi Uploader for Gravity Forms WordPress plugin up to version 1.1.8 contains a missing authorization vulnerability that allows unauthenticated attackers to delete arbitrary media attachments. This occurs because the deletion function lacks proper capability checks and exposes a nonce on public pages, enabling permanent media library destruction.
CVSS v3.1
Score 9.1critical
Affected software
sh1zen
Multi Uploader for Gravity Forms
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-5581 is a missing authorization vulnerability (CWE-862) in the Multi Uploader for Gravity Forms plugin for WordPress, affecting all versions up to and including 1.1.8. The vulnerability arises from the `plupload_ajax_delete_file()` function, which is registered via `wp_ajax_nopriv_gfmu_delete_file` and lacks proper capability checks. Although a nonce is used for CSRF protection, it is exposed on any public-facing page containing a multi-uploader form field via the `GFMU_options` JavaScript object. This exposure allows unauthenticated attackers to supply an attachment ID and delete any media file in the WordPress media library permanently.
Potential Impact
An unauthenticated attacker can permanently delete any media attachment in the WordPress media library by exploiting this vulnerability. This can lead to complete destruction of the media library, impacting website content and availability of media assets. The CVSS 3.1 score is 9.1 (critical), reflecting network attack vector, no privileges required, no user interaction, and high impact on 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 access to pages containing the multi-uploader form field or disable the plugin to prevent exploitation. Monitor for updates from the vendor for an official fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-04-04T16:22:40.644Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a72e5c9bf8831d53973510c
Added to database: 08/05/2026, 07:27:05 UTC
Last enriched: 08/12/2026, 15:28:56 UTC
Last updated: 09/19/2026, 22:01:36 UTC
Views: 80
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