CVE-2025-11200: Mlflow Authentication Bypass Vulnerability

HIGH
Advisory Identifier: GHSA-6xj8-rrqx-r4cv
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CVSS 8.1
CWE-521
Published
Advisory Summary

CVE-2025-11200 is a HIGH (CVSS 8.1) authentication bypass vulnerability (CWE-521: Weak Password Requirements) affecting Mlflow libraries in the PyPI ecosystem. The issue involves mlflow weak password requirements authentication bypass vulnerability. Remediation is available by upgrading affected packages to version 2.22.0rc0.

CVE-2025-11200 at a Glance

CVE Identifier CVE-2025-11200
GHSA Identifier GHSA-6xj8-rrqx-r4cv
Severity HIGH
CVSS v3.1 Base Score 8.1
CWE Classification CWE-521: Weak Password Requirements
Affected Product Mlflow
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 8.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).

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

How to Fix CVE-2025-11200

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

mlflow fixed: 2.22.0rc0 
pip install mlflow>=2.22.0rc0
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 mlflow

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2025-11200, inspect your installed packages using pip:

pip show mlflow

Analyze the terminal output to locate any version of Mlflow in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.22.0rc0), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-521: Weak Password Requirements, where the product does not require that users should have strong passwords. In Mlflow, 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

MLflow Weak Password Requirements Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass authentication on affected installations of MLflow. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of passwords. The issue results from weak password requirements. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-26916.

CVE-2025-11200 Affected Mlflow Versions

1 component(s)
Fixed Versions:
2.22.0rc0
Product / Package Ecosystem Affected Versions Fixed Version
mlflow
pypi/mlflow
PyPI
< 2.22.0rc0
2.22.0rc0

References

NVD — CVE-2025-11200 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-11200
Security Fix Commit FIX COMMIT
https://github.com/mlflow/mlflow/commit/1f74f3f24d8273927b8db392c23e108576936c54
Mlflow Source Repository REPOSITORY
https://github.com/mlflow/mlflow
www.zerodayinitiative.com/advisories/zdi-25-9... WEB
https://www.zerodayinitiative.com/advisories/ZDI-25-932

Frequently Asked Questions

What is CVE-2025-11200?
CVE-2025-11200 is a security vulnerability in Mlflow involving MLflow Weak Password Requirements Authentication Bypass Vulnerability under CWE-521: Weak Password Requirements.
Which Mlflow versions are affected?
Affected versions include releases prior to 2.22.0rc0 across affected packages: mlflow.
What version fixes CVE-2025-11200?
Upgrading to 2.22.0rc0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is mlflow affected?
Yes, mlflow is affected in releases prior to 2.22.0rc0. Upgrade your dependency to 2.22.0rc0 or later.
What is the CVSS score of CVE-2025-11200?
CVE-2025-11200 has a CVSS v3.1 base score of 8.1 (HIGH) with vector string CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2025-11200?
CVE-2025-11200 is classified under CWE-521: Weak Password Requirements (The product does not require that users should have strong passwords.).
How can I check PyPI dependencies for CVE-2025-11200?
Run the dependency tree command: 'pip show mlflow'. 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-6xj8-rrqx-r4cv",
  "modified" : "2025-11-05T16:10:51Z",
  "published" : "2025-10-29T21:30:33Z",
  "aliases" : [ "CVE-2025-11200" ],
  "summary" : "MLflow Weak Password Requirements Authentication Bypass Vulnerability",
  "details" : "MLflow Weak Password Requirements Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass authentication on affected installations of MLflow. Authentication is not required to exploit this vulnerability.\n\nThe specific flaw exists within the handling of passwords. The issue results from weak password requirements. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-26916.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "mlflow"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.22.0rc0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-11200"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mlflow/mlflow/commit/1f74f3f24d8273927b8db392c23e108576936c54"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/mlflow/mlflow"
  }, {
    "type" : "WEB",
    "url" : "https://www.zerodayinitiative.com/advisories/ZDI-25-932"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-521" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-11-05T16:09:13Z",
    "nvd_published_at" : "2025-10-29T20:15:35Z"
  }
}