CVE-2021-39267 : Vulnerability Insights and Analysis

SuiteCRM before 7.11.19 is prone to persistent cross-site scripting (XSS) that can allow a remote attacker to execute arbitrary JavaScript.

Understanding CVE-2021-39267

This CVE involves a vulnerability in SuiteCRM that enables attackers to introduce malicious JavaScript through a Content-Type Filter bypass during file uploads.

What is CVE-2021-39267?

The issue arises from SuiteCRM's failure to block certain file types, like text/xml, which can execute JavaScript. This risk is present in versions before 7.11.19.

The Impact of CVE-2021-39267

The vulnerability permits remote attackers to inject and run arbitrary JavaScript code through malicious file uploads, potentially compromising the security and integrity of the system.

Technical Details of CVE-2021-39267

SuiteCRM's XSS vulnerability has the following technical aspects:

Vulnerability Description

XSS flaw in SuiteCRM's web interface pre-7.11.19
Allows remote attacker-controlled JavaScript injection

Affected Systems and Versions

Product: SuiteCRM
Versions affected: Before 7.11.19

Exploitation Mechanism

Attackers bypass Content-Type Filter to upload hostile files
SuiteCRM doesn't block file types that allow JavaScript execution

Mitigation and Prevention

To address CVE-2021-39267, follow these security measures:

Immediate Steps to Take

Upgrade SuiteCRM to version 7.11.19 or later
Regularly monitor for unauthorized file uploads

Long-Term Security Practices

Implement input validation mechanisms in the web application
Conduct security audits to detect and mitigate similar vulnerabilities

Patching and Updates

Apply patches and updates provided by SuiteCRM promptly to fix the XSS vulnerability.