CVE-2021-33337 : Vulnerability Insights and Analysis
Learn about CVE-2021-33337, a Cross-site Scripting (XSS) vulnerability in Liferay Portal and DXP versions, allowing remote attackers to inject malicious scripts or HTML.
A Cross-site scripting (XSS) vulnerability was discovered in the Document Library module's add document menu in Liferay Portal 7.3.0 through 7.3.4, and Liferay DXP 7.1 before fix pack 20, and 7.2 before fix pack 9, which could allow remote attackers to inject arbitrary web script or HTML.
Understanding CVE-2021-33337
This section will cover what CVE-2021-33337 entails, its impact, technical details, and mitigation strategies.
What is CVE-2021-33337?
The vulnerability is related to a stored XSS issue in Liferay Portal and Liferay DXP versions, allowing malicious entities to insert harmful scripts or HTML code through a specified parameter.
The Impact of CVE-2021-33337
The exploit could be leveraged by remote attackers to execute arbitrary scripts on the target system, potentially leading to unauthorized data disclosure or manipulation.
Technical Details of CVE-2021-33337
Let's dive deeper into the specifics of the vulnerability.
Vulnerability Description
The flaw exists in the handling of user input within the Document Library module's functionality, creating an avenue for XSS attacks.
Affected Systems and Versions
Liferay Portal versions 7.3.0 through 7.3.4 and Liferay DXP versions 7.1 (pre-fix pack 20) and 7.2 (pre-fix pack 9) are impacted by this security issue.
Exploitation Mechanism
Remote threat actors can exploit this vulnerability by injecting malicious scripts or HTML code through the _com_liferay_document_library_web_portlet_DLAdminPortlet_name parameter.
Mitigation and Prevention
To safeguard systems from CVE-2021-33337, immediate actions and long-term security practices should be implemented.
Immediate Steps to Take
Organizations should apply relevant security patches and updates provided by Liferay to address the vulnerability promptly.
Long-Term Security Practices
Implementing input validation mechanisms, user input sanitization, and security-related code reviews can help prevent XSS vulnerabilities in web applications.
Patching and Updates
Regularly monitoring vendor advisories and promptly applying patches and updates are crucial in maintaining a secure environment.