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CVE-2026-78077— Joomla Extension - joomshaper.com - Stored Cross-Site Scripting (XSS) in MegaMenu Layout Container & Embed Inputs in Helix Ultimate < 2.2.11

Quick assessment

Affected
joomshaper.com Helix Ultimate extension for Joomla
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Joomla 扩展 - joomshaper.com - Helix Ultimate 2.2.10 之前版本中 MegaMenu 布局容器及嵌入式输入字段存在存储型跨站脚本（XSS）漏洞 在 Helix Ultimate 2.2.10 之前版本中，MegaMenu 布局 JSON 中存储的未净化的列和条目配置值在渲染时未进行完整的上下文转义，导致可注入恶意的 HTML/JS 代码。修复措施包括实施更严格的净化处理，并通过 和 引入标签白名单机制。

CVSS 8.6 · High EPSS 0.42% · P36

Possible ATT&CK Techniques 1 AI

T1059.001 · PowerShell

Affected Version Matrix 1

VendorProduct Version RangeStatus
joomshaper.com Helix Ultimate extension for Joomla 1.0-2.2.9 affected
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I. Basic Information for CVE-2026-78077

Vulnerability Information
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Vulnerability Title
Joomla Extension - joomshaper.com - Stored Cross-Site Scripting (XSS) in MegaMenu Layout Container & Embed Inputs in Helix Ultimate < 2.2.11
Source: CVE Program / CVE List V5
Vulnerability Description
Joomla Extension - joomshaper.com - Stored Cross-Site Scripting (XSS) in MegaMenu Layout Container & Embed Inputs in Helix Ultimate < 2.2.11 - Unsanitized column and item configuration values stored within the MegaMenu layout JSON were rendered without complete contextual escaping, allowing injection of malicious HTML/JS. Stricter sanitization and tag allowlists via `InputFilter` and `htmlspecialchars` were implemented.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
joomshaper.com Helix Ultimate extension for Joomla 1.0-2.2.10 -

II. Public POCs for CVE-2026-78077

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III. Intelligence Information for CVE-2026-78077

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Vendor Pages for CVE-2026-78077 (1)

Same Patch Batch · joomshaper.com · 2026-08-31 · 5 CVEs total

CVE-2026-78078 8.9 HIGH Joomla Extension - joomshaper.com - Privileged File Upload Bypass via Content Spoofing in
CVE-2026-78079 5.3 MEDIUM Joomla Extension - joomshaper.com - Privileged File Upload Bypass via Content Spoofing in
CVE-2026-78076 5.1 MEDIUM Joomla Extension - joomshaper.com - Broken Access Control & Missing Authorization in MegaM
CVE-2026-78075 5.1 MEDIUM Joomla Extension - joomshaper.com - Broken Object-Level Authorization in Blog Image Deleti

IV. Related Vulnerabilities

Same product: Helix Ultimate extension for Joomla
Same vendor: joomshaper.com
Same weakness: CWE-79