CVE-2026-126537 (GCVE-0-2026-126537)

Vulnerability from cvelistv5 – Published: 2026-11-11 12:34 – Updated: 2026-11-12 15:49
VLAI
Title
Ninja Forms - File Uploads <= 3.3.36 - Unauthenticated Arbitrary File Deletion via 'files[].data.file_path' Parameter via 'extra.saveProgress'
Summary
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.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-12 15:48 UTC
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2432 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
SaturdayDrive Ninja Forms - File Uploads Affected: 0 , ≤ 3.3.36 (semver)
guessed Create a notification for this product.
Credits
daroo
Show details on NVD website
To clipboard 

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