CVE-2019-11818 : Security Advisory and Response

Alkacon OpenCMS v10.5.4 and earlier versions are susceptible to stored cross-site scripting (XSS) in the New User module (/opencms/system/workplace/admin/accounts/user_new.jsp), allowing malicious JavaScript injection through user input fields.

Understanding CVE-2019-11818

This CVE identifies a vulnerability in Alkacon OpenCMS that enables attackers to execute arbitrary JavaScript by exploiting user input fields.

What is CVE-2019-11818?

The vulnerability in Alkacon OpenCMS v10.5.4 and prior versions allows for stored cross-site scripting (XSS) attacks, enabling threat actors to inject and execute malicious JavaScript via input fields like First Name or Last Name.

The Impact of CVE-2019-11818

The stored XSS vulnerability in Alkacon OpenCMS can lead to various security risks, including unauthorized access, data theft, and potential compromise of user interactions.

Technical Details of CVE-2019-11818

This section provides in-depth technical insights into the vulnerability.

Vulnerability Description

The flaw in Alkacon OpenCMS v10.5.4 and earlier versions permits stored cross-site scripting (XSS) attacks through the New User module, allowing attackers to insert and execute arbitrary JavaScript via user input fields.

Affected Systems and Versions

Alkacon OpenCMS v10.5.4 and prior versions

Exploitation Mechanism

Attackers can exploit the vulnerability by injecting malicious JavaScript into fields like First Name or Last Name, which gets executed when the affected snippet loads.

Mitigation and Prevention

Protecting systems from CVE-2019-11818 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Alkacon OpenCMS to the latest version that includes a patch for the XSS vulnerability.
Implement input validation mechanisms to sanitize user inputs and prevent malicious script injections.

Long-Term Security Practices

Conduct regular security audits and code reviews to identify and address vulnerabilities promptly.
Educate users and administrators about safe input practices and the risks associated with XSS attacks.

Patching and Updates

Stay informed about security advisories and updates released by Alkacon to patch known vulnerabilities and enhance system security.