CVE-2021-40714 : Exploit Details and Defense Strategies

Adobe Experience Manager version 6.5.9.0 (and earlier) is affected by a reflected Cross-Site Scripting (XSS) vulnerability via the accesskey parameter. This CVE was made public on September 14, 2021.

Understanding CVE-2021-40714

Adobe Experience Manager has a medium severity vulnerability that allows an attacker to execute malicious JavaScript by convincing a user to visit a crafted URL.

What is CVE-2021-40714?

The vulnerability in Adobe Experience Manager allows an attacker to perform a reflected Cross-Site Scripting (XSS) attack by exploiting the accesskey parameter.

The Impact of CVE-2021-40714

The impact is rated with a CVSS base score of 6.1, making it a medium severity issue. The attack complexity is low, requiring user interaction, and affecting confidentiality and integrity to a low degree, with no availability impact.

Technical Details of CVE-2021-40714

Adobe Experience Manager's vulnerability has the following technical details:

Vulnerability Description

CVSS Score: 6.1 (Medium)
Attack Complexity: Low
Attack Vector: Network
Privileges Required: None
User Interaction: Required

Affected Systems and Versions

Product: Adobe Experience Manager
Versions Affected: <= 6.5.9.0, unspecified custom versions

Exploitation Mechanism

The vulnerability is exploited through a crafted URL containing malicious JavaScript that could execute within the victim's browser context.

Mitigation and Prevention

To mitigate the risk associated with CVE-2021-40714, consider the following steps:

Immediate Steps to Take

Update Adobe Experience Manager to a non-vulnerable version
Educate users on safe browsing practices
Implement web application firewall rules to filter out malicious requests

Long-Term Security Practices

Regularly monitor and audit web traffic for suspicious activities
Keep software and security systems up to date

Patching and Updates

Apply patches and updates provided by Adobe promptly to address the vulnerability.