What’s Vulnerable › Vulnerabilities

CVE-2026-12406: User Frontend <= 4.3.7 - Missing Authorization to Unauthenticated Arbitrary Attachment Deletion via 'attach_id' Parameter

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-09 · updated 2026-07-09
• Weakness: CWE-862

Description

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.

Affected products

• wedevs User Frontend: AI Powered Frontend Posting, User Directory, Profile Builder, Membership & User Registration: through 4.3.7

References

• https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.2/includes/Ajax.php#L27
• https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.2/includes/Ajax/Upload_Ajax.php#L257
• https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.2/includes/Ajax/Upload_Ajax.php#L271
• https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.2/includes/Frontend.php#L88
• https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.7/includes/Ajax.php#L27
• https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.7/includes/Ajax/Upload_Ajax.php#L257
• https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.7/includes/Ajax/Upload_Ajax.php#L271
• https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.7/includes/Frontend.php#L88
• https://plugins.trac.wordpress.org/changeset?reponame=&old=3578622%40wp-user-frontend&new=3578622%40wp-user-frontend
• https://www.wordfence.com/threat-intel/vulnerabilities/id/0049583a-0ad3-45e4-a29e-4b8c33d09857?source=cve

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