CVE-2020-15270 : What You Need to Know
Learn about CVE-2020-15270, a vulnerability in Parse Server allowing clients with expired sessions to receive subscription objects. Find mitigation steps and update information here.
Parse Server (npm package parse-server) allows clients with expired sessions to still receive subscription objects due to improper session token validation.
Understanding CVE-2020-15270
Parse Server has a vulnerability that permits clients with expired sessions to receive subscription objects.
What is CVE-2020-15270?
- Parse Server broadcasts events to all clients without validating session token validity.
- Clients with expired sessions can still receive subscription objects.
The Impact of CVE-2020-15270
- CVSS Score: 4.3 (Medium)
- Attack Vector: Network
- Confidentiality Impact: Low
- Integrity Impact: None
- Privileges Required: Low
- Scope: Unchanged
- This issue is not patched.
Technical Details of CVE-2020-15270
Parse Server vulnerability details and affected systems.
Vulnerability Description
- Parse Server allows clients with expired sessions to receive subscription objects.
Affected Systems and Versions
- Affected Product: parse-server
- Vendor: parse-community
- Vulnerable Versions: <= 4.3.0
Exploitation Mechanism
- Clients exploit the vulnerability by receiving subscription objects with expired sessions.
Mitigation and Prevention
Steps to mitigate and prevent the CVE-2020-15270 vulnerability.
Immediate Steps to Take
- Monitor for unauthorized access to subscription objects.
- Regularly check and invalidate expired session tokens.
Long-Term Security Practices
- Implement session token validation checks in Parse Server.
- Educate users on the importance of maintaining valid session tokens.
Patching and Updates
- Update Parse Server to version > 4.3.0 to address the vulnerability.