CVE-2019-7740 : What You Need to Know

A vulnerability was found in Joomla! versions earlier than 3.9.3, allowing for a potential XSS attack due to insufficient handling of parameters in JavaScript code.

Understanding CVE-2019-7740

This CVE identifies a security issue in Joomla! that could lead to cross-site scripting (XSS) attacks.

What is CVE-2019-7740?

CVE-2019-7740 is a vulnerability in Joomla! versions prior to 3.9.3, where inadequate parameter handling in JavaScript code (core.js writeDynaList) creates a potential XSS attack vector.

The Impact of CVE-2019-7740

The vulnerability could be exploited by attackers to execute XSS attacks on websites using affected Joomla! versions.

Technical Details of CVE-2019-7740

This section provides more technical insights into the vulnerability.

Vulnerability Description

The issue arises from the improper handling of parameters in the core.js writeDynaList JavaScript code in Joomla! versions before 3.9.3, opening the door to XSS attacks.

Affected Systems and Versions

Affected Product: Joomla!
Affected Versions: Earlier than 3.9.3

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating parameters in the core.js writeDynaList JavaScript code to inject malicious scripts into web pages.

Mitigation and Prevention

Protecting systems from CVE-2019-7740 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Joomla! to version 3.9.3 or later to mitigate the vulnerability.
Implement input validation and output encoding to prevent XSS attacks.

Long-Term Security Practices

Regularly monitor and update Joomla! and its extensions to patch security flaws.
Educate developers on secure coding practices to prevent similar vulnerabilities.

Patching and Updates

Apply security patches provided by Joomla! promptly to address known vulnerabilities.