CVE-2026-14558
HighCVSS 7.2Exploitation Probability (EPSS)
Low risk43th percentile - higher than 43% of all known CVEs
Summary
The User Frontend WordPress plugin before version 4.3.10 does not properly validate field type definitions and deserializes user-controlled post metadata when rendering submitted posts. Users with Editor-level access and above can inject arbitrary PHP objects, which can lead to remote code execution when a suitable POP chain is present on the site.
Risk Assessment
Risk of remote code execution on the server, potentially leading to full site takeover and data breach.
Recommendation
Update the User Frontend plugin to version 4.3.10 or later. Restrict access to Editor-level accounts and above.
Other vulnerabilities in User Frontend
See all- CVE-2026-5459Medium
The User Frontend plugin for WordPress versions up to 4.3.1 contains an Insecure Direct Object Reference (IDOR) vulnerability in the payment_page() function. Missing validation on the 'user_id' parameter allows unauthenticated attackers to activate a free subscription pack for any user, overwriting their existing paid subscription and causing loss of paid features.
- CVE-2026-12418Medium
The User Frontend plugin for WordPress up to version 4.3.7 is vulnerable to Insecure Direct Object Reference (IDOR) via the 'wpuf_files_data' parameter. Missing validation on a user-controlled key allows unauthenticated attackers to overwrite the post_title, post_content, and post_excerpt of any arbitrary post, including administrator posts.
- CVE-2026-12406Medium
The User Frontend plugin for WordPress up to version 4.3.7 has an authorization bypass vulnerability. Unauthenticated attackers can delete arbitrary media attachments with post_author 0 via the wpuf_file_del AJAX action.
Original NVD description (English source)
The User Frontend WordPress plugin before 4.3.10 does not properly validate field type definitions and deserialises user-controlled post metadata when rendering submitted posts, allowing users with Editor-level access and above to inject arbitrary PHP objects, which can lead to remote code execution when a suitable POP chain is present on the site.