CVE-2026-56290NVD

Vulnerability Summary

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.

Severity Level

CRITICAL(10.0)

Published Date

Jun 29, 2026

Last Modified

Oct 8, 2026

PoC

Available(Nuclei)

Exploitation Status

ACTIVE

EPSS Score (30-Day)

30.87%Probability

Root Weakness (CWE)

CWE-434: Unrestricted File Upload ↗

The software allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment.

CVSS v4.0 Base Metrics — Score 10.0 (CRITICAL)

Attack VectorNetwork

Attack ComplexityLow

Attack RequirementsNone

Privileges RequiredNone

User InteractionNone

Confidentiality (Vulnerable System)High

Integrity (Vulnerable System)High

Availability (Vulnerable System)High

Confidentiality (Subsequent System)High

Integrity (Subsequent System)High

Availability (Subsequent System)High

Affected & Patched Versions

Affected Versions

joomlack.fr JoomlaCK.fr Page Builder CK extension for Joomla >= 1.0-3.6.0

Patched Versions

Not provided by cveorg for this CVE.

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