WordPress security changelog
HIGH CVE-2026-1499 Deferred

WP Duplicate: Dangerous file upload

WP Duplicate is affected by dangerous file upload. The vulnerable path is reachable without authentication. Successful exploitation can place attacker-controlled executable content on the server and may lead to full site compromise.

CVE / CNA score 8.8 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
WP Duplicate
Plugin slug
local-sync
Affected
See vendor advisory
Safe version
See mitigation notes
Published
Feb 06, 2026
Weakness
CWE-862 — Missing Authorization

This CVE was published Feb 06, 2026 and is one of 2 known issues for this plugin.

What to do

Update, patch or deactivate.

Update WP Duplicate to a release outside the affected range, or disable and remove it until a fixed version is available.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The WP Duplicate plugin for WordPress is vulnerable to Missing Authorization leading to Arbitrary File Upload in all versions up to and including 1.1.8. This is due to a missing capability check on the `process_add_site()` AJAX action combined with path traversal in the file upload functionality. This makes it possible for authenticated (subscriber-level) attackers to set the internal `prod_key_random_id` option, which can then be used by an unauthenticated attacker to bypass authentication checks and write arbitrary files to the server via the `handle_upload_single_big_file()` function, ultimately leading to remote code execution.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Primary and upstream sources