CVE-2020-13275 : What You Need to Know

A user with an unverified email address could request access to domain-restricted groups in GitLab versions 12.2 to 13.0.1.

Understanding CVE-2020-13275

This CVE involves improper authorization in GitLab, potentially allowing unauthorized access to restricted groups.

What is CVE-2020-13275?

The vulnerability in GitLab versions 12.2 to 13.0.1 enables users with unverified email addresses to request access to domain-restricted groups.

The Impact of CVE-2020-13275

CVSS Score: 8 (High Severity)
Attack Vector: Network
Attack Complexity: High
Privileges Required: Low
User Interaction: Required
Scope: Changed
Confidentiality, Integrity, and Availability Impact: High

Technical Details of CVE-2020-13275

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allows users with unverified email addresses to request access to domain-restricted groups in affected GitLab versions.

Affected Systems and Versions

Affected Product: GitLab
Affected Versions:
GitLab >=12.2, <12.9.8
GitLab >=12.10, <12.10.7
GitLab >=13.0, <13.0.1

Exploitation Mechanism

The vulnerability can be exploited by users with unverified email addresses to gain unauthorized access to domain-restricted groups.

Mitigation and Prevention

To address CVE-2020-13275, follow these mitigation steps:

Immediate Steps to Take

Upgrade GitLab to a patched version.
Verify email addresses for all users accessing domain-restricted groups.
Monitor access requests to detect unauthorized attempts.

Long-Term Security Practices

Regularly review and update access control policies.
Educate users on the importance of verifying email addresses.

Patching and Updates

Apply security patches provided by GitLab to fix the vulnerability.