CVE-2021-39892 : Vulnerability Insights and Analysis

In this article, you will learn about a vulnerability in GitLab versions that could allow a lower privileged user to import users from projects and disclose email addresses.

Understanding CVE-2021-39892

This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2021-39892.

What is CVE-2021-39892?

CVE-2021-39892 affects GitLab versions, allowing lower privileged users to import users from projects without maintaining roles and expose their email addresses.

The Impact of CVE-2021-39892

The CVSSv3.1 base score for this vulnerability is 4.3 (Medium severity) with low confidentiality impact and no integrity impact. Attack complexity is low, and user interaction is not required.

Technical Details of CVE-2021-39892

Explore the vulnerability description, affected systems, and exploitation mechanism below.

Vulnerability Description

GitLab CE/EE versions since 12.0 are impacted, enabling lower privileged users to reveal email addresses by importing users from projects they lack maintainer roles on.

Affected Systems and Versions

Product: GitLab
Vendor: GitLab
Vulnerable Versions:
=12.0, <14.1.7

=14.2, <14.2.5

=14.3, <14.3.1

Exploitation Mechanism

The vulnerability allows unauthorized users to extract email addresses by importing users from certain projects without correct permissions.

Mitigation and Prevention

Protect your systems with these immediate and long-term security practices.

Immediate Steps to Take

Update GitLab to versions not listed as affected to prevent exploitation.
Monitor user activities and permissions to prevent unauthorized information disclosure.

Long-Term Security Practices

Regularly review and adjust user roles and permissions in GitLab.
Educate users on the importance of maintaining data privacy and secure practices.

Patching and Updates

GitLab has released patches for this vulnerability, so ensure timely updates to secure your systems.