Description
FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to 1.5.2-stable and 2.0.1-beta, file read handling in backend/pkg/indexing/indexingFiles.go resolves symbolic links through GetRealPath without confirming that the resolved target remains inside the source root and the user's authorized scope. Download, preview, media, OnlyOffice, and public-share read flows that enable FollowSymlinks can therefore serve an out-of-scope target through a reachable in-scope symlink. An authenticated user with download access can read server-accessible files outside the assigned scope, and a holder of a public share link can do the same without an account when the shared directory exposes such a symlink. This issue is fixed in 1.5.2-stable and 2.0.1-beta.
References8
- github.com/gtsteffaniak/filebrowser/commit/3c8c02414eefd3351ffe…
- github.com/gtsteffaniak/filebrowser/commit/4126edeb07a015c3809a…
- github.com/gtsteffaniak/filebrowser/pull/2795
- github.com/gtsteffaniak/filebrowser/pull/2800
- github.com/gtsteffaniak/filebrowser/releases/tag/v1.5.2-stable
- github.com/gtsteffaniak/filebrowser/releases/tag/v2.0.1-beta
- github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-mg…
- github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-mg…
Metrics
- CVSS 3.1
-
8.6
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - EPSS — exploit probability
- 1% percentile: 45 · as of 4 November 2026
- CWE
- CWE-22CWE-59
Could this be exploited in your environment?
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