Remote Code Execution Vulnerability in User Frontend Plugin for WordPress
CVE-2026-14558

7.2HIGH

Key Information:

Vendor

WordPress
Status
User Frontend
Vendor
CVE Published:
28 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-14558?

The User Frontend plugin for WordPress prior to version 4.3.10 fails to properly validate field type definitions, which permits deserialization of user-controlled post metadata during the rendering of submitted posts. This vulnerability can be exploited by users with Editor-level access or higher to inject arbitrary PHP objects, potentially leading to remote code execution if a suitable payload is constructed.

Affected Version(s)

User Frontend 0 < 4.3.10

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-14558 - Proof of Concept

References

https://wpscan.com/vulnerability/217303f4-4363-46f6-8aee-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
7.2
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Hijun Kim
WPScan
.