Vulnerabilities in pkg:npm/files-bucket-server

PACKAGE
Advisory Identifier: GHSA-3r3j-4vrw-884j
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Advisory Summary

CVE-2025-8021 is a HIGH (CVSS 7.5) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Files bucket server libraries in the npm ecosystem. The issue involves files-bucket-server vulnerable to directory traversal. Remediation is available in the latest vendor maintenance releases.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/files-bucket-server

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:npm/files-bucket-server. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-3r3j-4vrw-884j CVE-2025-8021 HIGH files-bucket-server vulnerable to Directory Traversal

CVE-2025-8021 at a Glance

CVE Identifier CVE-2025-8021
GHSA Identifier GHSA-3r3j-4vrw-884j
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Files bucket server
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2025-8021

To remediate this vulnerability, upgrade all affected Files bucket server dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

files-bucket-server fixed: Latest secure release 
npm install files-bucket-server@Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls files-bucket-server

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2025-8021, inspect your project dependencies using npm:

npm ls files-bucket-server

Analyze the terminal output to locate any version of Files bucket server in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The npm ls files-bucket-server command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Files bucket server, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

All versions of the package files-bucket-server are vulnerable to Directory Traversal, where an attacker can traverse the file system and access files outside of the intended directory.

CVE-2025-8021 Affected Files bucket server Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
files-bucket-server
npm/files-bucket-server
npm
≤ 1.2.6

References

NVD — CVE-2025-8021 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-8021
Files bucket server Source Repository REPOSITORY
https://gist.github.com/lirantal/1f833a7d445e8cfbdcb3e75022954b35#path-traversal-vulnerability-in-files-bucket-server
Files bucket server Source Repository REPOSITORY
https://github.com/dsilva2401/files-bucket-server
Files bucket server Security Information SECURITY
https://security.snyk.io/vuln/SNYK-JS-FILESBUCKETSERVER-9510944

Frequently Asked Questions

What is CVE-2025-8021?
CVE-2025-8021 is a security vulnerability in Files bucket server involving files-bucket-server vulnerable to Directory Traversal under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Files bucket server versions are affected?
Affected versions include releases prior to current release patches across affected packages: files-bucket-server.
What version fixes CVE-2025-8021?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is files-bucket-server affected?
Yes, files-bucket-server is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2025-8021?
CVE-2025-8021 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2025-8021?
CVE-2025-8021 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check npm dependencies for CVE-2025-8021?
Run the dependency tree command: 'npm ls files-bucket-server'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-3r3j-4vrw-884j",
  "modified" : "2025-09-26T21:50:25Z",
  "published" : "2025-07-23T06:33:50Z",
  "aliases" : [ "CVE-2025-8021" ],
  "summary" : "files-bucket-server vulnerable to Directory Traversal",
  "details" : "All versions of the package files-bucket-server are vulnerable to Directory Traversal, where an attacker can traverse the file system and access files outside of the intended directory.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "files-bucket-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.2.6"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-8021"
  }, {
    "type" : "WEB",
    "url" : "https://gist.github.com/lirantal/1f833a7d445e8cfbdcb3e75022954b35#path-traversal-vulnerability-in-files-bucket-server"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/dsilva2401/files-bucket-server"
  }, {
    "type" : "WEB",
    "url" : "https://security.snyk.io/vuln/SNYK-JS-FILESBUCKETSERVER-9510944"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-07-23T16:32:11Z",
    "nvd_published_at" : "2025-07-23T05:15:30Z"
  }
}