CVE-2021-42551 Explained : Impact and Mitigation

A Cross-site Scripting (XSS) vulnerability in the search functionality of AlCoda NetBiblio WebOPAC allows an unauthenticated user to execute a reflected XSS attack. This vulnerability affects specific versions of the product.

Understanding CVE-2021-42551

This CVE involves a reflected XSS vulnerability in AlCoda NetBiblio WebOPAC's search feature, impacting certain versions.

What is CVE-2021-42551?

Cross-site Scripting (XSS) vulnerability in the search functionality of AlCoda NetBiblio WebOPAC allows an unauthenticated user to craft a reflected Cross-Site Scripting attack. This issue affects AlCoda NetBiblio WebOPAC versions prior to 4.0.0.320 and later than 4.0.0.328, excluding version 4.0.0.335 and later.

The Impact of CVE-2021-42551

CVSS Base Score: 6.1 (Medium)
Attack Vector: Network
Attack Complexity: Low
User Interaction: Required
Confidentiality Impact: Low
Integrity Impact: Low
Availability Impact: None
Privileges Required: None
Scope: Changed

Technical Details of CVE-2021-42551

This section provides technical details about the vulnerability.

Vulnerability Description

The vulnerability allows an attacker to perform a reflected XSS attack through the search functionality of AlCoda NetBiblio WebOPAC.

Affected Systems and Versions

AlCoda NetBiblio WebOPAC versions prior to 4.0.0.320
AlCoda NetBiblio WebOPAC versions later than 4.0.0.328

Exploitation Mechanism

The attacker can exploit the XSS vulnerability via the search feature to execute malicious scripts.

Mitigation and Prevention

To protect your systems from CVE-2021-42551, follow these mitigation steps.

Immediate Steps to Take

Upgrade to version 4.0.0.335 or later to mitigate the vulnerability.

Long-Term Security Practices

Regularly update and patch the AlCoda NetBiblio WebOPAC software.

Patching and Updates

Ensure timely installation of security patches and updates to address known vulnerabilities.