CVE-2026-78078
Received Received - Intake

Privileged File Upload Bypass in Helix Ultimate

Publication date: 2026-08-31

Last updated on: 2026-08-31

Assigner: Joomla! Project

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.

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Meta Information

Published
2026-08-31
Last Modified
2026-08-31
Generated
2026-08-31
AI Q&A
2026-08-31
EPSS Evaluated
N/A
NVD
CVE-2026-78078
EUVD
EUVD-2026-68527

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
joomshaper helix_ultimate to 2.2.10 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-434 The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

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Executive Summary

This vulnerability involves a privileged file upload bypass in Joomla extensions Helix Ultimate versions before 2.2.10. Attackers could upload non-image files disguised as images by exploiting weak validation that only checked file extensions and size. The flaw allowed malicious files to bypass security checks.

Detection Guidance

Check if Helix Ultimate version is below 2.2.10 by inspecting the extension in Joomla admin panel. Look for unexpected image uploads in media directories, especially files with mismatched extensions or non-image content.

Impact Analysis

An attacker could exploit this to upload malicious files to your Joomla site, potentially gaining unauthorized access or control. This could lead to data theft, defacement, or further compromise of your website and server.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR and HIPAA requirements for data protection and integrity. Organizations may face compliance violations, fines, or legal consequences if exploited.

Mitigation Strategies

Update Helix Ultimate to version 2.2.10 or later immediately. Review all uploaded images for suspicious files and remove any non-image files disguised as images. Implement strict file upload policies and monitor upload directories.

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