CVE-2026-30934 Details
Description
FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to 1.3.1-beta and 1.2.2-stable, Stored XSS is possible via share metadata fields (e.g., title, description) that are rendered into HTML for /public/share/<hash> without context-aware escaping. The server uses text/template instead of html/template, allowing injected scripts to execute when victims visit the share URL. This vulnerability is fixed in 1.3.1-beta and 1.2.2-stable.
A stored cross-site scripting vulnerability has been identified in FileBrowser Quantum versions prior to 1.3.1-beta and 1.2.2-stable. The issue arises in the public share page, where unsanitized share metadata fields, such as the title and description, are rendered into HTML without proper context-aware escaping. This flaw allows injected scripts to execute when the share URL is visited. The vulnerability is rooted in the server's use of text/template for rendering, which lacks the necessary HTML escaping, enabling the execution of malicious scripts.
Users can upgrade to FileBrowser Quantum versions 1.3.1-beta or 1.2.2-stable to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 10, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/gtsteffaniak/filebrowser/releases/tag/v1.2.2-stable | [email protected] | Release Notes |
| https://github.com/gtsteffaniak/filebrowser/releases/tag/v1.3.1-beta | [email protected] | Release Notes |
| https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-r633-fcgp-m532 | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| filebrowser filebrowser | <= 1.2.9 1.2.1 stable 1.3.0 beta |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 18, 2026 | Initial Analysis | [email protected] |
| Mar 10, 2026 | New CVE Received | [email protected] |