CVE-2026-49049 PoC — Joomla Extension - joomshaper.com - Unauthenticated access to Helix3 template ajax handler

Source

https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-49049.yaml

Associated Vulnerability

Title: Joomla Extension - joomshaper.com - Unauthenticated access to Helix3 template ajax handler (CVE-2026-49049)
Description:The Helix3 plugin for Joomla exposes an ajax handler task, that allows unauthenticated attackers to delete arbitrary files, write arbitrary JSON files and update template parameters.

Description

JoomShaper Helix3 template framework versions 1.0 through 3.1.0 for Joomla expose an unauthenticated AJAX handler (plg_ajax_helix3) accessible via the Joomla com_ajax component. The onAjaxHelix3() plugin method processes data[action]=save requests without any authentication check or CSRF token validation. Unauthenticated remote attackers can write arbitrary JSON content to server-side files. The layoutName parameter contains no path traversal validation, enabling write to any directory writable by the web server process. Actively exploited in the wild by the AntonKill botnet campaign.

File Snapshot

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