CVE-2026-105606
CriticalCVSS 9.5Summary
The Joomla Custom Tables extension before 3.7.8 allows an unauthenticated attacker to upload a polyglot file with an attacker-controlled extension to the web-accessible tmp directory. The stored path is disclosed in the response, and the file is served as static content by default.
Risk Assessment
An attacker can host attacker-controlled content (e.g., phishing or malware pages) under the victim's domain, undermining trust in the site and enabling further attacks on users.
Recommendation
Update the Custom Tables extension to version 3.7.8 or later and consider disabling public submission forms if they are not required.
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Original NVD description (English source)
Joomla Extension - joomlaboat.com - Unauthenticated arbitrary file upload in Custom Tables < 3.7.8 - An unauthenticated attacker can upload a polyglot file with an attacker-controlled extension to the web-accessible tmp directory of any Joomla site that exposes a public Custom Tables submission form, and the stored path is disclosed in the response. By default the uploaded file is served as static content, so the primary impact is an unauthenticated arbitrary file write to a web-accessible directory, which allows hosting of attacker-controlled content (for example phishing or malware pages) under the victim's domain.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS