Unauthorized File Upload Vulnerability in User Profile Builder Plugin for WordPress
CVE-2026-76548

8.2HIGH

Key Information:

Vendor

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-76548?

The User Profile Builder plugin for WordPress prior to version 4.0.1 features a misconfiguration in its front-end file upload functionality. This oversight permits unauthenticated users to upload files, a privilege typically restricted to user roles with higher access rights. As a result, these unauthorized individuals can access, list, and manipulate the site's media library, along with the ability to modify unpublished posts and pages, potentially compromising the integrity of the site's content.

Affected Version(s)

User Profile Builder 3.8.1 < 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-2026-76548 - Proof of Concept

References

https://wpscan.com/vulnerability/75e0611d-e11d-44f8-8fc1-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
8.2
Severity:
HIGH
Confidentiality:
Low
Integrity:
High
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Erwan LR (WPScan)
WPScan
.