CVE-2026-30934: high-severity vulnerability in gtsteffaniak filebrowser
FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse)
Published
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.9epss 0.4%
exploitation probability
0.4%top 71% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L
Affected products
gtsteffaniak · filebrowserRelated CVEs — gtsteffaniak filebrowser
In the same product, most dangerous first.
CVE-2026-44542CRITICALFileBrowser Quantum: Unauthenticated Path Traversal in Public Share Delete Allows Arbitrary File DeletionEPSS 0.6%CVE-2026-30933HIGHFileBrowser Quantum Incomplete Remediation of CVE-2026-27611: Password-Protected Share Bypass via /public/api/share/infoEPSS 0.5%CVE-2026-48777CRITICALFileBrowser Quantum: Path Traversal in public share PATCH allows file ops outside shared directoryEPSS 0.5%CVE-2026-54685MEDIUMFileBrowser Quantum has Username Enumeration via Authentication Timing Side-ChannelEPSS 0.5%CVE-2026-54910HIGHFileBrowser Quantum's path traversal issue in subtitle handler allows any authenticated user to read arbitrary filesEPSS 0.5%CVE-2026-46410HIGHFileBrowser Quantum: unauthenticated user share share infoEPSS 0.4%