CVE-2021-46398: Cross-Site Request Forgery in Filebrowser
Summary
CVE-2021-46398: Cross-Site Request Forgery in Filebrowser. Affects github.com/filebrowser/filebrowser/v2 versions < 2.18.0. Fixed in 2.18.0. How to fix ↓
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Background
Filebrowser is a Go package that provides a web-based file manager with a user-friendly interface. It allows users to navigate and manage files on a server through a web browser. The package is vulnerable to a Cross-Site Request Forgery (CSRF) attack, which can be exploited to create a backdoor user with admin privileges and gain unauthorized access to the filesystem. This vulnerability affects versions prior to 2.18.0 of the package.
Vulnerability Detail
The Cross-Site Request Forgery (CSRF) vulnerability in Filebrowser allows an attacker to trick a victim into performing unintended actions on their behalf. By sending a malicious HTML webpage to the victim, the attacker can create a backdoor user with admin privileges. This unauthorized user can then access the filesystem and potentially perform malicious activities. The vulnerability has a CVSS score of 8.8, indicating a high severity level.
How To Fix
Latest published version: v2.63.23 as of 22 Oct 2026
go get github.com/filebrowser/filebrowser/v2@v2.63.23Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
2.18.0
This is the first release that contains the fix.
go get github.com/filebrowser/filebrowser/v2@v2.18.0Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is essential to update Filebrowser to the latest version to mitigate the risk.
Conclusion
The Cross-Site Request Forgery (CSRF) vulnerability in Filebrowser allows attackers to create a backdoor user with admin privileges and gain unauthorized access to the filesystem. To mitigate this risk, it is crucial to update Filebrowser to version 2.18.0 or later. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for github.com/filebrowser/filebrowser/v2 →
FAQ
Filebrowser is a Go package that provides a web-based file manager with a user-friendly interface. It allows users to navigate and manage files on a server through a web browser.
A CSRF vulnerability allows an attacker to trick a victim into performing unintended actions on their behalf. In the case of Filebrowser, it can be exploited to create a backdoor user with admin privileges and gain unauthorized access to the filesystem.
The vulnerability allows an attacker to create a backdoor user with admin privileges, potentially leading to unauthorized access to the filesystem and the ability to perform malicious activities.
To fix this vulnerability, it is recommended to upgrade Filebrowser to version 2.18.0 or later. This version includes a fix for the CSRF vulnerability.
There is no known workaround for this vulnerability. It is essential to update Filebrowser to the latest version to mitigate the risk.
References
Related vulnerabilities
Recent vulnerabilities recorded for github.com/filebrowser/filebrowser/v2.
