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The CVE-2025-XXXX vulnerability in MoonShine v3.12.4 stems from insufficient validation of file uploads, specifically within the handling of SVG files. The application fails to properly sanitize the content of uploaded SVG images, which can contain embedded JavaScript code. When an attacker uploads a malicious SVG file, the application stores it. Subsequent retrieval and rendering of this file by an administrator or the application itself, for example within an assets directory or an image gallery, causes the embedded script to execute within the context of the victim’s browser session. This allows for Cross-Site Scripting (XSS) and, given the administrative context of the MoonShine panel, can lead to a complete compromise of the application backend through session hijacking or other client-side attacks, effectively permitting remote code execution on the underlying server if combined with other techniques.
Platform: Laravel Admin Panel
Version: v3.12.4
Vulnerability: Arbitrary File Upload
Severity: Moderate
date: 2025-08-19
Prediction: Patch by 2025-09-02
What Undercode Say:
`find . -name “.php” -exec grep -l “SVG\|image/svg+xml\|upload” {} \;`
curl -F "[email protected]" http://target/moonshine/upload`Content-Security-Policy: default-src ‘self’`.
``
<h2 style="color: blue;">How Exploit:</h2>
Craft a malicious SVG file containing JavaScript. Authenticate with low-privilege user or find an unauthenticated upload endpoint. Upload the SVG file. Trigger execution by accessing the uploaded file's URL directly or luring an admin to view it in the panel.
<h2 style="color: blue;">Protection from this CVE:</h2>
Update MoonShine upon patch release. Implement server-side file type verification (MIME, signature). Sanitize SVG files on upload. Store uploaded files outside web root. Configure web server to serve SVG with `Content-Type: image/svg+xml` and
Impact:
Arbitrary JavaScript execution in admin context, leading to session theft, admin privilege escalation, and potential server-side remote code execution.
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Sources:
Reported By: github.com
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