PHP Object Injection Vulnerability in User Profile Builder WordPress Plugin
CVE-2026-76547

6.6MEDIUM

Key Information:

Vendor

WordPress
Status
User Profile Builder
Vendor
CVE Published:
29 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-76547?

The User Profile Builder WordPress plugin prior to version 4.0.1 exhibits a flaw in its deserialization process, failing to properly validate the data when importing configuration files. This vulnerability enables high privilege users, such as administrators, to potentially perform PHP Object Injection attacks. While the affected feature is a free add-on that is disabled by default, the exploit could still lead to further vulnerabilities if a malicious gadget from an alternative installed instance of the plugin is utilized.

Affected Version(s)

User Profile Builder 3.3.4 < 4.0.1

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-2026-76547 - Proof of Concept

CVE-2026-76547
Created by H4zaz

References

https://wpscan.com/vulnerability/b80151f4-e910-4263-9ecc-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
6.6
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Vivien LEBAS
WPScan
.