CVE-2026-1499 json
WP Duplicate <= 1.1.8 - Authenticated (Subscriber+) Arbitrary File Upload via 'process_add_site' AJAX Action
published 2026-02-06 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-5649
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 64%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 6 mo ago
Exploit prediction
1.04% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- revmakx WP Duplicate – WordPress Migration Plugin
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/11bb7190-023b-45e1-99a5-7313c489ef45?source=cve
- plugins.trac.wordpress.org /browser/local-sync/trunk/admin/class-local-sync-admin.php#L422
- plugins.trac.wordpress.org /browser/local-sync/tags/1.1.8/admin/class-local-sync-admin.php#L422
- plugins.trac.wordpress.org /browser/local-sync/trunk/includes/class-local-sync-handle-server-requests.php#L389
- plugins.trac.wordpress.org /browser/local-sync/tags/1.1.8/includes/class-local-sync-handle-server-requests.php#L389
- plugins.trac.wordpress.org /browser/local-sync/trunk/admin/class-local-sync-files-op.php#L843
- plugins.trac.wordpress.org /browser/local-sync/tags/1.1.8/admin/class-local-sync-files-op.php#L843
- plugins.trac.wordpress.org /changeset?sfp_email=&sfph_mail=&reponame=&new=3452904%40local-sync&old=3400317%40local-sync&sfp_email=&sfph_m
Sources
- CVE List CVE-2026-1499
- NVD CVE-2026-1499
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.