{"affected":[{"defaultStatus":"unaffected","product":"Ninja Forms - File Uploads","source":"CNA: Wordfence","vendor":"SaturdayDrive","versions":[{"lessThanOrEqual":"3.3.36","status":"affected","version":"0","versionType":"semver"}]}],"cveId":"CVE-2026-126537","cwes":["CWE-22"],"description":"The Ninja Forms - File Uploads add-on for WordPress is vulnerable to Arbitrary File Deletion (and arbitrary file read via S3/Dropbox/Google Drive exfiltration) in versions up to, and including, 3.3.36. The flaw spans NF_FU_Fields_Upload::process() in includes/fields/upload.php — which returns early (leaving the client-supplied files[] intact) whenever a public submission carries a nonempty extra.saveProgress — and NF_FU_External_Abstracts_Service::process_upload() in includes/external/abstracts/service.php, whose authoritative-path reload only fires when the client sends upload_id. By omitting upload_id, an attacker's data[file_path] survives into the Background Upload queue and is used by both upload_file_to_s3() (as SourceFile) and the maybe_delete_server_file() unlink() call in includes/external/abstracts/backgroundupload.php, with no canonicalization or upload-directory containment check (the plugin's own is_path_within_upload_dir() helper is only applied on admin paths). This makes it possible for unauthenticated attackers to delete arbitrary files on the affected site's server which may make remote code execution possible — specifically, deleting wp-config.php forces WordPress into its setup screen, enabling full site takeover.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":9.1,"severity":"critical","source":"CNA: Wordfence","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","version":"3.1"}],"modifiedAt":1794400485417,"publishedAt":1794400485417,"references":[{"source":"CNA: Wordfence","tags":[],"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/3670e2aa-6d8e-4ba5-ab65-49bd2a3dcacc?source=cve"},{"source":"CNA: Wordfence","tags":[],"url":"https://ninjaforms.com/extensions/file-uploads/"}],"remediation":[],"revision":"497bdeb5d3b33510b244214e2ba5f7fd9d2fcd87115bc9c3bc09f8dca134e7a3","sources":[{"modifiedAt":1794400485417,"name":"CNA: Wordfence","retrievedAt":1794402600021,"url":"https://www.cve.org/CVERecord?id=CVE-2026-126537"}],"ssvc":null,"status":"published","title":"Ninja Forms - File Uploads <= 3.3.36 - Unauthenticated Arbitrary File Deletion via 'files[].data.file_path' Parameter via 'extra.saveProgress'","updatedAt":1794402600021}