CVE-2025-43863: Vantage6 Remote Code Execution Vulnerability

LOW
Advisory Identifier: GHSA-j6g5-p62x-58hw
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CWE-307
Published
Advisory Summary

CVE-2025-43863 is a LOW remote code execution vulnerability (CWE-307: Improper Restriction of Excessive Authentication Attempts) affecting Vantage6 libraries in the PyPI ecosystem. The issue involves vantage6 lacks brute-force protection on change password functionality. Remediation is available by upgrading affected packages to version 4.11.0.

CVE-2025-43863 at a Glance

CVE Identifier CVE-2025-43863
GHSA Identifier GHSA-j6g5-p62x-58hw
Severity LOW
CVSS v3.1 Base Score N/A
CWE Classification CWE-307: Improper Restriction of Excessive Authentication Attempts
Affected Product Vantage6
Package Ecosystem PyPI
Published Date
Last Updated

How to Fix CVE-2025-43863

To remediate this vulnerability, upgrade all affected Vantage6 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

vantage6 fixed: 4.11.0 
pip install vantage6>=4.11.0
Verify Direct and Transitive Dependencies

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

pip show vantage6

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2025-43863, inspect your installed packages using pip:

pip show vantage6

Analyze the terminal output to locate any version of Vantage6 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.11.0), your application is affected.

Note: The pip show vantage6 command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-307: Improper Restriction of Excessive Authentication Attempts, where the product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame. In Vantage6, 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

### Impact If attacker gets access to an authenticated session, they can try to brute-force the user password by using the change password functionality: they can call that route infinitely which will return the message that password is wrong until it is correct ### Patches This issue has been patched in version 4.11.0 ### Workarounds None

CVE-2025-43863 Affected Vantage6 Versions

1 component(s)
Fixed Versions:
4.11.0
Product / Package Ecosystem Affected Versions Fixed Version
vantage6
pypi/vantage6
PyPI
< 4.11.0
4.11.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/vantage6/vantage6/security/advisories/GHSA-j6g5-p62x-58hw
NVD — CVE-2025-43863 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-43863
Security Fix Commit FIX COMMIT
https://github.com/vantage6/vantage6/commit/e0f1841b310f6f610e8137db2506cf683ce154d0
Vantage6 Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/vantage6/PYSEC-2025-220.yaml
Vantage6 Source Repository REPOSITORY
https://github.com/vantage6/vantage6

Frequently Asked Questions

What is CVE-2025-43863?
CVE-2025-43863 is a security vulnerability in Vantage6 involving vantage6 lacks brute-force protection on change password functionality under CWE-307: Improper Restriction of Excessive Authentication Attempts.
Which Vantage6 versions are affected?
Affected versions include releases prior to 4.11.0 across affected packages: vantage6.
What version fixes CVE-2025-43863?
Upgrading to 4.11.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is vantage6 affected?
Yes, vantage6 is affected in releases prior to 4.11.0. Upgrade your dependency to 4.11.0 or later.
What CWE is associated with CVE-2025-43863?
CVE-2025-43863 is classified under CWE-307: Improper Restriction of Excessive Authentication Attempts (The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.).
How can I check PyPI dependencies for CVE-2025-43863?
Run the dependency tree command: 'pip show vantage6'. 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-j6g5-p62x-58hw",
  "modified" : "2026-06-08T19:51:59Z",
  "published" : "2025-06-12T23:00:41Z",
  "aliases" : [ "CVE-2025-43863" ],
  "summary" : "vantage6 lacks brute-force protection on change password functionality",
  "details" : "### Impact\nIf attacker gets access to an authenticated session, they can try to brute-force the user password by using the change password functionality: they can call that route infinitely which will return the message that password is wrong until it is correct\n\n### Patches\nThis issue has been patched in version 4.11.0\n\n### Workarounds\nNone",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "vantage6"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.11.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/vantage6/vantage6/security/advisories/GHSA-j6g5-p62x-58hw"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-43863"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vantage6/vantage6/commit/e0f1841b310f6f610e8137db2506cf683ce154d0"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/vantage6/PYSEC-2025-220.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/vantage6/vantage6"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-307" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-06-12T23:00:41Z",
    "nvd_published_at" : "2025-06-12T18:15:20Z"
  }
}