CVE-2026-5581: Multi Uploader for Gravity Forms <= 1.1.8 - Missing Authorization to Unauthenticated Arbitrary Media Deletion
The Multi Uploader for Gravity Forms plugin for WordPress is vulnerable to unauthorized arbitrary media deletion in all versions up to, and including, 1.1.8. This is due to missing capability checks in the pluploadajaxdeletefile() function, which is registered via wpajaxnoprivgfmudeletefile. The nonce intended for CSRF protection is exposed on any public-facing page containing a multi-uploader form field via the GFMUoptions JavaScript object. This makes it possible for unauthenticated attackers to permanently delete any WordPress media attachment by supplying its attachment ID, potentially leading to complete media library destruction.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
WordPress plugin: Multi Uploader for Gravity Formsto a version that resolves this vulnerability.Fixed in 1.1.8 - Compensating control
Block unauthenticated access to the WordPress AJAX action `gfmu_delete_file` (registered via `wp_ajax_nopriv_gfmu_delete_file`) at the network/WAF/ACL layer so only authenticated, authorized users can invoke it.