CVE-2026-12406 json
User Frontend <= 4.3.7 - Missing Authorization to Unauthenticated Arbitrary Attachment Deletion via 'attach_id' Parameter
published 2026-07-09 4 mo ago modified 2026-07-09 4 mo ago also EUVD-2026-42537
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 46%
- public exploits
- 0
- none known
Summary
The User Frontend: AI Powered Frontend Posting, User Directory, Profile, Membership & User Registration plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.3.7. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to delete arbitrary media attachments whose post_author is 0, such as guest and registration-form uploads, via the wpuf_file_del AJAX action. This is exploitable by unauthenticated visitors on any site where a WPUF shortcode is rendered on a front-end page, as this causes the valid wpuf_nonce value to be localized into publicly accessible JavaScript objects (wpuf_upload and wpuf_frontend), satisfying the sole access control gate.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.56% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected products
- wedevs User Frontend: AI Powered Frontend Posting, User Directory, Profile Builder, Membership & User Registration
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/0049583a-0ad3-45e4-a29e-4b8c33d09857?source=cve
- plugins.trac.wordpress.org /browser/wp-user-frontend/tags/4.3.7/includes/Ajax/Upload_Ajax.php#L271
- plugins.trac.wordpress.org /browser/wp-user-frontend/tags/4.3.7/includes/Ajax/Upload_Ajax.php#L257
- plugins.trac.wordpress.org /browser/wp-user-frontend/tags/4.3.7/includes/Ajax.php#L27
- plugins.trac.wordpress.org /browser/wp-user-frontend/tags/4.3.7/includes/Frontend.php#L88
- plugins.trac.wordpress.org /browser/wp-user-frontend/tags/4.3.2/includes/Ajax/Upload_Ajax.php#L271
- plugins.trac.wordpress.org /browser/wp-user-frontend/tags/4.3.2/includes/Ajax/Upload_Ajax.php#L257
- plugins.trac.wordpress.org /browser/wp-user-frontend/tags/4.3.2/includes/Ajax.php#L27
- plugins.trac.wordpress.org /browser/wp-user-frontend/tags/4.3.2/includes/Frontend.php#L88
- plugins.trac.wordpress.org /changeset?reponame=&old=3578622%40wp-user-frontend&new=3578622%40wp-user-frontend
Sources
- CVE List CVE-2026-12406
- NVD CVE-2026-12406
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.