CVE-2020-15126 Explained : Impact and Mitigation

In parser-server from version 3.5.0 and before 4.3.0, an authenticated user using the viewer GraphQL query can bypass all read security on his User object and linked objects.

Understanding CVE-2020-15126

This CVE involves an information disclosure vulnerability in parse-server versions 3.5.0 to 4.3.0.

What is CVE-2020-15126?

The vulnerability allows an authenticated user to bypass read security on their User object and linked objects via a viewer GraphQL query.

The Impact of CVE-2020-15126

CVSS Base Score: 6.5 (Medium)
Confidentiality Impact: High
Attack Vector: Network
Privileges Required: Low
User Interaction: None

Technical Details of CVE-2020-15126

This section provides more technical insights into the vulnerability.

Vulnerability Description

The issue allows an authenticated user to circumvent read security on their User object and linked objects using a viewer GraphQL query.

Affected Systems and Versions

Affected Product: parse-server
Vendor: parse-community
Vulnerable Versions: >= 3.5.0, < 4.3.0

Exploitation Mechanism

The vulnerability can be exploited by an authenticated user through a specific viewer GraphQL query.

Mitigation and Prevention

Protect your systems from this vulnerability with the following steps.

Immediate Steps to Take

Upgrade parse-server to version 4.3.0 or newer.
Monitor and restrict user access to sensitive data.
Implement additional authentication mechanisms.

Long-Term Security Practices

Regularly review and update access control policies.
Conduct security training for developers and users.
Perform security audits and penetration testing.

Patching and Updates

Stay informed about security advisories and updates from parse-community.