CVE-2020-2503 : Security Advisory and Response

If exploited, this stored cross-site scripting vulnerability could allow remote attackers to inject malicious code in File Station. QNAP has already fixed these issues in QES 2.1.1 Build 20201006 and later.

Understanding CVE-2020-2503

This CVE involves a stored cross-site scripting vulnerability in QNAP's QES product.

What is CVE-2020-2503?

CVE-2020-2503 is a critical vulnerability that, if exploited, could permit remote attackers to inject malicious code into File Station.

The Impact of CVE-2020-2503

The vulnerability has a CVSS base score of 9, indicating a critical severity level with high impacts on confidentiality, integrity, and availability.

Technical Details of CVE-2020-2503

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The vulnerability is classified as CWE-79 (Cross-site Scripting) and CWE-80 (Improper Neutralization of Script-Related HTML Tags) and CWE-749 (Exposed Dangerous Method or Function).

Affected Systems and Versions

Product: QES
Vendor: QNAP Systems Inc.
Versions Affected: Build 20201006 with versions less than 2.1.1

Exploitation Mechanism

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: Required
Scope: Changed

Mitigation and Prevention

To address CVE-2020-2503, follow these mitigation and prevention strategies.

Immediate Steps to Take

Update QES to version 2.1.1 Build 20201006 or later.
Monitor for any suspicious activities in File Station.

Long-Term Security Practices

Regularly update and patch QES to the latest versions.
Educate users on safe browsing practices and potential security risks.

Patching and Updates

QNAP has released fixes for this vulnerability in QES 2.1.1 Build 20201006 and later.