CVE-2019-11814 : Exploit Details and Defense Strategies

A vulnerability was found in app/webroot/js/misp.js in MISP versions prior to 2.4.107. The vulnerability allows for persistent cross-site scripting (XSS) attacks through image names used in titles, as shown in a screenshot.

Understanding CVE-2019-11814

An issue was discovered in app/webroot/js/misp.js in MISP before 2.4.107. There is persistent XSS via image names in titles, as demonstrated by a screenshot.

What is CVE-2019-11814?

This CVE identifies a vulnerability in MISP versions prior to 2.4.107 that enables persistent cross-site scripting (XSS) attacks through image names within titles.

The Impact of CVE-2019-11814

The vulnerability can be exploited by attackers to execute malicious scripts in the context of a user's session, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2019-11814

The technical aspects of the vulnerability are as follows:

Vulnerability Description

The issue resides in the handling of image names within titles in the misp.js file, allowing for persistent XSS attacks.

Affected Systems and Versions

Affected System: MISP
Affected Versions: MISP versions prior to 2.4.107

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious image names that, when displayed in titles, execute arbitrary scripts in the context of the user's browser.

Mitigation and Prevention

To address CVE-2019-11814, follow these mitigation strategies:

Immediate Steps to Take

Upgrade MISP to version 2.4.107 or later to eliminate the vulnerability.
Avoid clicking on suspicious links or opening attachments from untrusted sources.

Long-Term Security Practices

Regularly update and patch software to prevent known vulnerabilities.
Implement content security policies to mitigate XSS risks.

Patching and Updates

Apply security patches promptly to ensure that known vulnerabilities are addressed and system security is maintained.