Unauthenticated Arbitrary File Upload in Page Builder CK

Publication date: 2026-06-29

Last updated on: 2026-07-24

Assigner: Joomla! Project

Description

Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension < 3.6.0 - The Joomla extension Page Builder CK is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-06-29

Last Modified

2026-07-24

Generated

2026-08-09

AI Q&A

2026-06-29

EPSS Evaluated

2026-08-07

NVD

CVE-2026-56290

EUVD

EUVD-2026-40121

Affected Vendors & Products

Vendor	Product	Version / Range
joomlack	page_builder_ck	to 3.6.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-434	The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

The Joomla extension Page Builder CK has a vulnerability that allows an unauthenticated attacker to upload arbitrary files, including executable files. This flaw can lead to full remote code execution (RCE) on the affected system.

Impact Analysis

This vulnerability can have severe impacts as it allows attackers to execute arbitrary code remotely without authentication. This can lead to complete compromise of the affected server, unauthorized access to sensitive data, disruption of services, and potential use of the server for malicious activities.

Hi! I’m here to help you understand CVE-2026-56290. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70