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CVE

CVE-2026-30934

FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse)
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CVE

CVE-2026-30934

FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse)

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.9
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L
C
H
U
-

Related Resources

No items found.

References

https://github.com/gtsteffaniak/filebrowser/releases/tag/v1.2.2-stable, https://github.com/gtsteffaniak/filebrowser/releases/tag/v1.3.1-beta, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30934.json, https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-r633-fcgp-m532, https://nvd.nist.gov/vuln/detail/CVE-2026-30934

Severity

8.9

CVSS Score
0
10

Basic Information

Base CVSS
8.9
EPSS Probability
0.00043%
EPSS Percentile
0.13587%
Introduced Version
0,e4907225a1ac0be759245417ac4d5289539f2cea
Fix Available
9d6e429a38be5f4d95476e2d272d6cdff7bcb784,09713b32a5f6e369a5197319749a12b8e7fd5f2b

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