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Vulnerabilities / CVE-2026-56290

CVE-2026-56290

Published 2026-06-29 · published (not yet in NVD)

CVE-2026-56290

Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension < 3.6.0

Exploited in the wild: CISA added it to the Known Exploited Vulnerabilities catalog on 2026-07-07, with a fix-by date of 2026-07-10. Patch it first.

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

10.0 CRITICAL
CVSS 4.0 · CNA
31%
chance of exploitation in the next 30 days (EPSS; higher than 98% of CVEs)

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.

Scores

Affected products

  • joomlack.fr JoomlaCK.fr Page Builder CK extension for Joomla: 1.0-3.6.0

Weakness: CWE-434

1 references (advisories, patches, write-ups)

Sources: CVE.org, FIRST EPSS. Missing ones did not answer or have no record yet.

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