Riskcovery

CVE-2026-30934

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

State
Published
Severity
8.9 High
Published
Mar 10, 2026
Updated
Mar 10, 2026
Reserved
Mar 7, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.18.9 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:LGitHub_M

Weaknesses

  • CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

ProductVersions
filebrowsergtsteffaniak
  • >= 1.3.0-beta, < 1.3.1-betaAffected
  • < 1.2.2-stableAffected

References

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