CVE-2026-5127
HighSummary
The User Frontend: AI Powered Frontend Posting, User Directory, Profile, Membership & User Registration plugin for WordPress is vulnerable to Deserialization of Untrusted Data in versions up to and including 4.3.1. This is due to insufficient input validation and type checking on the wpuf_files parameter during form submission.
Risk Assessment
Authenticated attackers with Subscriber-level access and above can inject arbitrary PHP objects, which can lead to arbitrary code execution, file deletion, or other malicious actions if a POP chain is present on the target system.
Recommendation
It is recommended to update the plugin to the latest version to mitigate this vulnerability. Additionally, implementing further input validation mechanisms is advisable.
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Original NVD description (English source)
The User Frontend: AI Powered Frontend Posting, User Directory, Profile, Membership & User Registration plugin for WordPress is vulnerable to Deserialization of Untrusted Data in versions up to, and including, 4.3.1 This is due to insufficient input validation and type checking on the wpuf_files parameter during form submission, combined with unconditional deserialization via maybe_unserialize() when displaying post content. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary PHP objects, which can be leveraged to execute arbitrary code, delete arbitrary files, or perform other malicious actions if a POP chain is present on the target system.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS