FileBrowser Quantum serves inline SVG files without a Content-Security-Policy header, allowing embedded JavaScript in SVG files to execute when accessed via public share links.
Verified on v1.3.0-stable.
gtsteffaniak/filebrowser)GET /public/api/resources/download?hash=HASH&inline=true<svg xmlns="http://www.w3.org/2000/svg">
<script>alert(document.domain)</script>
</svg>
?inline=trueThe inline download endpoint returns SVG files with:
Content-Type: image/svg+xml
Content-Disposition: inline; filename="xss.svg"
X-Content-Type-Options: nosniff
But no CSP header to block script execution. The upstream project (filebrowser/filebrowser) mitigates this with:
Content-Security-Policy: script-src 'none'
Add CSP header on inline file downloads:
w.Header().Set("Content-Security-Policy", "script-src 'none'")
This matches the upstream filebrowser/filebrowser implementation.
| Software | From | Fixed in |
|---|---|---|
github.com/gtsteffaniak/filebrowser
|
- | 0.0.0-20260501184955-6bfc3974192e |
A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.
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