CVE-2021-33326 Explained : Impact and Mitigation

A detailed overview of CVE-2021-33326 highlighting the cross-site scripting vulnerability in Liferay Portal and Liferay DXP.

Understanding CVE-2021-33326

This section will cover the vulnerability and its impact.

What is CVE-2021-33326?

The CVE-2021-33326 is a cross-site scripting (XSS) vulnerability found in the Frontend JS module in Liferay Portal versions 7.3.4 and earlier, as well as Liferay DXP versions 7.0 before fix pack 96, 7.1 before fix pack 20, and 7.2 before fix pack 9. This vulnerability allows remote attackers to inject arbitrary web script or HTML via the title of a modal window.

The Impact of CVE-2021-33326

The vulnerability poses a significant risk as it enables malicious actors to execute arbitrary script code within the context of the victim's browser, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2021-33326

Delving into the specific technical aspects of the vulnerability.

Vulnerability Description

The XSS flaw in the Frontend JS module of Liferay Portal and Liferay DXP permits attackers to insert malicious code through modal window titles, which can be executed within the victim's browser.

Affected Systems and Versions

Liferay Portal versions 7.3.4 and earlier, Liferay DXP versions 7.0, 7.1, and 7.2 before specific fix packs are confirmed to be impacted by this vulnerability.

Exploitation Mechanism

Remote threat actors can exploit this vulnerability by crafting specially designed titles for modal windows to inject malicious scripts or HTML, thereby compromising the security of affected systems.

Mitigation and Prevention

Outlined measures to address and prevent exploitation of CVE-2021-33326.

Immediate Steps to Take

Users are advised to apply the relevant security patches provided by Liferay for the affected versions. Additionally, implementing input validation mechanisms can help mitigate the risk of XSS attacks.

Long-Term Security Practices

Maintain regular security hygiene by staying updated on security advisories, conducting security assessments, and fostering a security-aware organizational culture to prevent similar vulnerabilities.

Patching and Updates

Regularly monitor official Liferay security channels for patches and updates addressing CVE-2021-33326 to ensure the systems are protected against known vulnerabilities.