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

Quick assessment

Affected
joomshaper.com Helix3 extension for Joomla
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

JoomShaper Helix3 extension for Joomla是JoomShaper公司的一款CMS插件组件。 JoomShaper Helix3 extension for Joomla 1.0版本至3.1.1版本存在权限许可和访问控制问题漏洞，该漏洞源于暴露了ajax处理程序任务，可能导致未经身份验证的攻击者删除任意文件、写入任意JSON文件和更新模板参数。

AI Predicted 9.8 Difficulty: Easy EPSS 0.99% · P61

Public Exploits 1

Nuclei · 1 CVE-2026-49049.yaml [template]

Affected Version Matrix 1

VendorProduct Version RangeStatus
joomshaper.com Helix3 extension for Joomla 1.0-3.1.1 affected
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I. Basic Information for CVE-2026-49049

Vulnerability Information
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Vulnerability Title
Joomla Extension - joomshaper.com - Unauthenticated access to Helix3 template ajax handler
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
JoomShaper Helix3 extension for Joomla 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
JoomShaper Helix3 extension for Joomla是JoomShaper公司的一款CMS插件组件。 JoomShaper Helix3 extension for Joomla 1.0版本至3.1.1版本存在权限许可和访问控制问题漏洞，该漏洞源于暴露了ajax处理程序任务，可能导致未经身份验证的攻击者删除任意文件、写入任意JSON文件和更新模板参数。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
joomshaper.com Helix3 extension for Joomla 1.0-3.1.1 -

II. Public POCs for CVE-2026-49049

# POC Description Source Link Shenlong Link
1 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. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-49049.yaml POC Details
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III. Intelligence Information for CVE-2026-49049

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Vendor Pages for CVE-2026-49049 (1)

IV. Related Vulnerabilities

Same vendor: joomshaper.com
Same weakness: CWE-284

V. Comments for CVE-2026-49049

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