Arbitrary File Upload Vulnerability in WP Duplicate Plugin by WordPress
CVE-2026-1499

9.8CRITICAL

Key Information:

Vendor

WordPress
Status
WP Duplicate – WordPress Migration Plugin
Vendor
CVE Published:
6 February 2026

What is CVE-2026-1499?

The WP Duplicate plugin for WordPress is susceptible to an arbitrary file upload vulnerability due to inadequate authorization checks. Specifically, the process_add_site() AJAX action is exposed, allowing attackers with subscriber-level access to manipulate the internal prod_key_random_id option. This can be exploited by unauthenticated attackers to circumvent security measures and upload arbitrary files to the server through the handle_upload_single_big_file() function, potentially leading to remote code execution.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

Affected Version(s)

WP Duplicate – WordPress Migration Plugin * <= 1.1.8

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://cwe.mitre.org/data/definitions/862.html
https://plugins.trac.wordpress.org/browser/local-sync/tru...

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Athiwat Tiprasaharn
JSON
.