CVE-2026-30934
FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse)
CVSS Score
8.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 |
| Vendor | gtsteffaniak |
| Product | filebrowser |
| Published | Mar 10, 2026 |
| Last Updated | Mar 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
Low
Affected Versions
gtsteffaniak / filebrowser
>= 1.3.0-beta, < 1.3.1-beta < 1.2.2-stable