PHP Object Injection Vulnerability in User Frontend Plugin by WordPress
CVE-2026-19116

Currently unrated

Key Information:

Vendor

WordPress
Status
User Frontend
Vendor
CVE Published:
2 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-19116?

The User Frontend Plugin for WordPress, prior to version 4.3.11, is susceptible to a vulnerability that allows authenticated users, with subscriber-level access and above, to exploit deserialization of user-supplied input when reopening a post for editing. This can result in PHP Object Injection, potentially leading to remote code execution if an appropriate gadget chain exists within the application environment, thus posing severe security risks.

Affected Version(s)

User Frontend 0 < 4.3.11

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-2026-19116 - Proof of Concept

References

https://wpscan.com/vulnerability/019d83bd-24d3-4575-9d0b-...
exploitvdb-entrytechnical-description

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Erwan LR (WPScan)
WPScan
.