CVE-2026-30934
published 2026-03-10CVE-2026-30934: 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…
PriorityP429medium5.4CVSS 3.1
AVNACLPRLUIRSCCLILAN
EPSS
0.35%
26.5th percentile
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/ 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.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| filebrowser | filebrowser | <= 1.2.9 | — |
| filebrowser | filebrowser | — | — |
| filebrowser | filebrowser | — | — |
| github.com | gtsteffaniak_filebrowser | >= 0 < 0.0.0-20260307130210-09713b32a5f6 | 0.0.0-20260307130210-09713b32a5f6 |
| gtsteffaniak | filebrowser | < 1.2.2-stable | 1.2.2-stable |
| gtsteffaniak | filebrowser | — | — |
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OSV
FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse) in github.com/gtsteffaniak/filebrowser
osv·2026-03-11
CVE-2026-30934 FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse) in github.com/gtsteffaniak/filebrowser
FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse) in github.com/gtsteffaniak/filebrowser
FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse) in github.com/gtsteffaniak/filebrowser
GHSA
FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse)
ghsa·2026-03-09
CVE-2026-30934 [HIGH] CWE-79 FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse)
FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse)
## Summary
Stored XSS is possible via share metadata fields (e.g., `title`, `description`) that are rendered into HTML for `/public/share/` without context-aware escaping. The server uses `text/template` instead of `html/template`, allowing injected scripts to execute when victims visit the share URL.
## Details
The server renders `public/index.html` using `text/template` and injects user-controlled share fields (title/description/etc.) into HTML contexts. `text/template` does not perform HTML contextual escaping like `html/template`. Because share metadata is persistent, the payload becomes stored and executes whenever a victim opens the affected share page.
Relevant code paths:
-
OSV
FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse)
osv·2026-03-09
CVE-2026-30934 [HIGH] FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse)
FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse)
## Summary
Stored XSS is possible via share metadata fields (e.g., `title`, `description`) that are rendered into HTML for `/public/share/` without context-aware escaping. The server uses `text/template` instead of `html/template`, allowing injected scripts to execute when victims visit the share URL.
## Details
The server renders `public/index.html` using `text/template` and injects user-controlled share fields (title/description/etc.) into HTML contexts. `text/template` does not perform HTML contextual escaping like `html/template`. Because share metadata is persistent, the payload becomes stored and executes whenever a victim opens the affected share page.
Relevant code paths:
-
No detection rules found.
No public exploits indexed.
2026-03-10
Published