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CVE-2026-78078— Joomla Extension - joomshaper.com - Privileged File Upload Bypass via Content Spoofing in Helix Ultimate < 2.2.10

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 中的内容欺骗导致的特权文件上传绕过漏洞 此前，图片上传功能仅校验文件扩展名和基本的文件大小参数。因此，非图片文件若伪装成栅格图像扩展名（如 .jpg、.png 等）即可成功上传。新版本增加了严格的 MIME 类型验证，并引入 GD 库的二进制栅格图像解码（通过 函数），以确保无效或格式错误的图像被严格拒绝（失败关闭，fail-closed）。

CVSS 8.9 · High EPSS 0.43% · P38

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-2026-78078

Vulnerability Information
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Vulnerability Title
Joomla Extension - joomshaper.com - Privileged File Upload Bypass via Content Spoofing in Helix Ultimate < 2.2.10
Source: CVE Program / CVE List V5
Vulnerability Description
Joomla Extension - joomshaper.com - Privileged File Upload Bypass via Content Spoofing in Helix Ultimate < 2.2.10 - Image uploads previously validated only file extension and basic size parameters. Non-image files disguised with raster extensions could be uploaded. Added strict MIME verification and GD binary raster decoding (imagecreatefromstring) to reject invalid/malformed images fail-closed.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
joomshaper.com Helix Ultimate extension for Joomla 1.0-2.2.9 -

II. Public POCs for CVE-2026-78078

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-78078

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Vendor Pages for CVE-2026-78078 (1)

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

CVE-2026-78077 8.6 HIGH Joomla Extension - joomshaper.com - Stored Cross-Site Scripting (XSS) in MegaMenu Layout
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-434