CVE-2020-9740 : What You Need to Know
Learn about CVE-2020-9740, a critical stored XSS vulnerability in Adobe Experience Manager versions 6.5.5.0 and below. Find out the impact, affected systems, and mitigation steps.
A stored XSS vulnerability in Adobe Experience Manager (AEM) versions 6.5.5.0 and below, 6.4.8.1 and below, 6.3.3.8 and below, and 6.2 SP1-CFP20 and below allows malicious scripts to be executed by users with 'Author' privileges.
Understanding CVE-2020-9740
This CVE involves a critical stored XSS vulnerability in AEM that impacts various versions.
What is CVE-2020-9740?
AEM versions 6.5.5.0 and below, 6.4.8.1 and below, 6.3.3.8 and below, and 6.2 SP1-CFP20 and below are susceptible to a stored XSS flaw. This vulnerability enables users with 'Author' privileges to insert harmful scripts into fields linked to the Design Importer, which can then be executed in a victim's browser.
The Impact of CVE-2020-9740
The vulnerability has a CVSS base score of 9.0, categorizing it as critical. The attack complexity is low, but the impact on confidentiality, integrity, and availability is high. User interaction is required for exploitation, and the scope is changed.
Technical Details of CVE-2020-9740
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The flaw allows users with 'Author' privileges to store malicious scripts in fields associated with the Design Importer, leading to potential script execution in victims' browsers.
Affected Systems and Versions
- Adobe Experience Manager versions 6.5.5.0 and below
- Adobe Experience Manager versions 6.4.8.1 and below
- Adobe Experience Manager versions 6.3.3.8 and below
- Adobe Experience Manager versions 6.2 SP1-CFP20 and below
Exploitation Mechanism
Users with 'Author' privileges can exploit this vulnerability by inserting malicious scripts into fields related to the Design Importer, which are then executed when the affected page is accessed.
Mitigation and Prevention
To address CVE-2020-9740, follow these mitigation strategies:
Immediate Steps to Take
- Upgrade AEM to a non-vulnerable version
- Implement strict input validation to prevent script injection
- Regularly monitor and audit user-generated content
Long-Term Security Practices
- Educate users on secure coding practices
- Enforce the principle of least privilege for user roles
- Conduct regular security training and awareness programs
Patching and Updates
- Apply security patches provided by Adobe promptly
- Stay informed about security advisories and updates from Adobe