CVE-2022-28820 : What You Need to Know

This article provides insights into the CVE-2022-28820 vulnerability affecting Adobe Experience Manager. It includes details on the vulnerability, its impact, and mitigation steps.

Understanding CVE-2022-28820

This section delves into the specifics of a Reflected Cross-site Scripting (XSS) vulnerability present in Adobe Experience Manager.

What is CVE-2022-28820?

Adobe Experience Manager, specifically ACS Commons version 5.1.x, is susceptible to a Reflected Cross-site Scripting (XSS) vulnerability. Attackers can exploit this flaw via the a and b GET parameters in /apps/acs-commons/content/page-compare.html, allowing them to execute arbitrary code within a victim's browser.

The Impact of CVE-2022-28820

The CVSS score for this vulnerability is 6.1, categorizing it as a medium severity issue. Although the attack complexity is low, successful exploitation requires user interaction. This vulnerability could lead to the injection of malicious JavaScript content into vulnerable form fields.

Technical Details of CVE-2022-28820

This section outlines the technical aspects related to CVE-2022-28820, including vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

ACS Commons version 5.1.x (and earlier) is susceptible to a Reflected Cross-site Scripting (XSS) vulnerability via the a and b GET parameters in /apps/acs-commons/content/page-compare.html. User input through these parameters is not adequately validated, potentially allowing for malicious script injections.

Affected Systems and Versions

The vulnerability impacts Adobe Experience Manager, specifically version 5.1.x, and earlier custom versions. The exploitation focuses on the a and b GET parameters in /apps/acs-commons/content/page-compare.html.

Exploitation Mechanism

To exploit CVE-2022-28820, attackers need to provide a crafted link to a user with access to AEM Author. By injecting malicious JavaScript content through the vulnerable parameters, the attacker can execute arbitrary code within the victim's browser.

Mitigation and Prevention

This section provides guidance on mitigating the risks associated with CVE-2022-28820 and preventing similar vulnerabilities in the future.

Immediate Steps to Take

Users should update to a patched version of ACS Commons to mitigate the vulnerability. Additionally, avoid clicking on suspicious links that may trigger the exploit.

Long-Term Security Practices

Implement input validation and sanitization mechanisms to prevent XSS attacks. Regular security audits and awareness training can also enhance overall security posture.

Patching and Updates

Stay informed about security advisories from Adobe Consulting Services and promptly apply patches to address known vulnerabilities in Adobe Experience Manager.