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MLflow Weak Password Requirements Authentication Bypass Vulnerability

High severity GitHub Reviewed Published Oct 29, 2025 to the GitHub Advisory Database • Updated Nov 5, 2025

Package

pip mlflow (pip)

Affected versions

< 2.22.0rc0

Patched versions

2.22.0rc0

Description

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.

References

Published by the National Vulnerability Database Oct 29, 2025
Published to the GitHub Advisory Database Oct 29, 2025
Reviewed Nov 5, 2025
Last updated Nov 5, 2025

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(65th percentile)

Weaknesses

Weak Password Requirements

The product does not require that users should have strong passwords, which makes it easier for attackers to compromise user accounts. Learn more on MITRE.

CVE ID

CVE-2025-11200

GHSA ID

GHSA-6xj8-rrqx-r4cv

Source code

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