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CVE-2026-3141 – Unauthenticated Arbitrary File Deletion – FormGent for WordPress ≤ 1.9.2

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Summary

CVE-2026-3141 is an unauthenticated arbitrary file deletion vulnerability in the FormGent plugin for WordPress (by wpwax). A missing capability check on a REST API endpoint lets unauthenticated attackers delete files, potentially including wp-config.php, which can lead to full site compromise. It is rated Critical (CVSS 9.1).

Technical details

  • Root cause: Missing authorization (CWE-862) — the /wp-json/formgent/responses/attachments REST API endpoint lacks a capability check.
  • Trigger conditions: An attacker sends a request to the vulnerable endpoint to remove an attachment; insufficient file path validation allows deletion beyond the intended formgent uploads directory.
  • Attack vector: Network, remotely exploitable, no authentication or user interaction required.
  • Impact: Deletion of arbitrary files on the server. Removing critical files such as wp-config.php can force the site into a reinstallation/setup state, enabling site takeover.

Affected software

  • FormGent for WordPress — all versions up to and including 1.9.2.

Severity

  • CVSS v3.1 Base Score: 9.1 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Mitigation and recommended actions

  • Immediate: Update FormGent to version 1.10.0 or later, which adds capability checks and hardened upload path validation with signed file tokens.
  • If no patch can be applied: Restrict or block network access to the /wp-json/formgent/responses/attachments REST API endpoint (for example via a WAF rule or web server access control), and deactivate the plugin until it can be updated.

References

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