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HIGH severity

CVE-2021-46398 — filebrowser

HIGHFix: filebrowser/filebrowser@74b7cd8

CVE-2021-46398 is a high-severity (CVSS 8.8) Cross-Site Request Forgery (CSRF) vulnerability in github.com/filebrowser/filebrowser/v2. 8 public exploit references exist, so weaponization risk is real. A fix is available for github.com/filebrowser/filebrowser/v2 — see the affected versions and patch details below.

Cross-Site Request Forgery in Filebrowser

Also known asGHSA-72wf-hwcq-65h9GO-2022-0563
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
8 known
Exploitation data as of Oct 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
6.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs94th percentile — riskier than 94% of all scored CVEsHighest risk
5.56%7.52%9.49%11.5%10.3%6.7%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2021-46398 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
🐹github.com/filebrowser/filebrowser/v2

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

A Cross-Site Request Forgery vulnerability exists in Filebrowser < 2.18.0 that allows attackers to create a backdoor user with admin privilege and get access to the filesystem via a malicious HTML webpage that is sent to the victim. An admin can run commands using the FileBrowser and hence it leads to RCE.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/filebrowser/filebrowser/v2all versions2.18.0go get github.com/filebrowser/filebrowser/v2@v2.18.0

Affected Products

1 product · 1 configurations
Application
filebrowserfilebrowser
< 2.18.0
range
Exploits & PoCs
8

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-50717webappsmultiple

FileBrowser 2.17.2 - Cross Site Request Forgery (CSRF) to Remote Code Execution (RCE)

by FEBIN MON SAJI · Feb 8, 2022

Exploit-DB Source

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/filebrowser/filebrowser/v2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update github.com/filebrowser/filebrowser/v2 to 2.18.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-46398 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

A Cross-Site Request Forgery vulnerability exists in Filebrowser < 2.18.0 that allows attackers to create a backdoor user with admin privilege and get access to the filesystem via a malicious HTML webpage that is sent to the victim. An admin can run commands using the FileBrowser and hence it leads to RCE.
O3 Security · Impact-Aware SCA

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CVE-2021-46398: filebrowser — Fixed in 2.18.0