WP Duplicate <= 1.1.8 - Authenticated (Subscriber+) Arbitrary File Upload via 'process_add_site' AJAX Action

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Summary

CVECVE-2026-1499
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-02-06 09:15:48 UTC
Updated2026-04-08 17:21:10 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

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

Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Revmakx WP Duplicate WordPress Migration Plugin affected 1.1.8 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/local-sync/tags/1.1.8/includes/class-local-sync-handl... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/local-sync/tags/1.1.8/admin/class-local-sync-files-op... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/11bb7190-023b-45e1-99a5-7313c... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/local-sync/trunk/includes/class-local-sync-handle-ser... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/local-sync/trunk/admin/class-local-sync-files-op.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/local-sync/trunk/admin/class-local-sync-admin.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/local-sync/tags/1.1.8/admin/class-local-sync-admin.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Athiwat Tiprasaharn (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-01-30T11:21:13.000ZVendor Notified
CNA2026-02-05T19:59:16.000ZDisclosed
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