CVE-2025-52900 File Browser has Insecure File Permissions
Attackers can read uploaded files and the database if the server umask is not hardened, exposing sensitive data to any local OS account.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-52900?
CVE-2025-52900 is a medium-severity vulnerability in filebrowser, published on 26 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. The file access permissions for files uploaded to or created from File Browser are never explicitly set by the application. The same is true for the database used by File Browser. On standard servers using File Browser prior to version 2.33.7 where the umask configuration has not been hardened before, this makes all the stated files readable by any operating system account. Version 2.33.7 fixes the issue.
Weakness: CWE-276
Which versions are affected by CVE-2025-52900?
6 open source packages ship an affected version, including github.com/filebrowser/filebrowser and github.com/filebrowser/filebrowser/v2. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/filebrowser/filebrowser Go | All versions | None |
github.com/filebrowser/filebrowser Go | All versions to 1.11.0 | None |
github.com/filebrowser/filebrowser Go | All versions to 1.11.0 | None |
github.com/filebrowser/filebrowser/v2 Go | All versions | 2.33.7 |
github.com/filebrowser/filebrowser/v2 Go | All versions | 2.33.7 |
github.com/filebrowser/filebrowser/v2 Go | All versions | 2.33.7 |
Products include Filebrowser Filebrowser.
How do I fix CVE-2025-52900?
Upgrade to a fixed version.
Is CVE-2025-52900 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-52900 exists.
Other vulnerabilities in filebrowser
- CVE-2026-32760 File Browser Self Registration Grants Any User Admin Access When Default Permissions Include Admin
- CVE-2026-29188 File Browser: TUS Delete Endpoint Bypasses Delete Permission Check
- CVE-2023-39612 Cross-site scripting in n/a
- CVE-2026-30934 FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse)
- CVE-2021-46398 Cross-Site Request Forgery in Filebrowser
Sources
Also known as GHSA-jj2r-455p-5gvf, GO-2025-3785.