Vulnerability in Multi Uploader for Gravity Forms (WordPress plugin) (CVE-2026-5581)
Summary
Vulnerability in Multi Uploader for Gravity Forms (WordPress plugin) (CVE-2026-5581). Data can be tampered with by attackers. Exploitable via wp_ajax_nopriv_gfmu_delete_file.
Original description
The description as published by the source.
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 plupload_ajax_delete_file() function, which is registered via wp_ajax_nopriv_gfmu_delete_file. The nonce intended for CSRF protection is exposed on any public-facing page containing a multi-uploader form field via the GFMU_options 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.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-5581 has been found in Multi Uploader for Gravity Forms (WordPress plugin).
Attackers can target a specific entry point like wp_ajax_nopriv_gfmu_delete_file over the network to misuse the product.
Data can be tampered with by attackers. CVSS score: 9.1/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Multi Uploader for Gravity Forms (WordPress plugin) CVE-2026-5581" on the vendor's site.
CVE-2026-5581 (Multi Uploader for Gravity Forms (WordPress plugin)) — CWE-862 / CVSS v3 9.1
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: wp_ajax_nopriv_gfmu_delete_file / GFMU_options
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-862) exists in Multi Uploader for Gravity Forms (WordPress plugin). Attackers reach the vulnerable code path via wp_ajax_nopriv_gfmu_delete_file without authentication.
Check the vendor advisory for the affected versions of Multi Uploader for Gravity Forms (WordPress plugin). Attack surface: wp_ajax_nopriv_gfmu_delete_file / GFMU_options.
Severity: Critical (CVSS 9.1/10). Data can be tampered with by attackers.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Multi Uploader for Gravity Forms (WordPress plugin) を使っているサービスとバージョンを洗い出す。
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2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web nvd.nist.gov
- web github.com