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CVE-2026-56290 PoC — Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension < 3.6.0

Source
https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-56290.yaml
Associated Vulnerability
Title: Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension < 3.6.0 (CVE-2026-56290)
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.
Description
Joomla Page Builder CK contains an unrestricted file upload vulnerability caused by lack of proper validation, letting unauthenticated attackers upload executable files and achieve remote code execution.
File Snapshot

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