CVE-2019-9554 : Exploit Details and Defense Strategies

Craft CMS 3.1.12 Pro version has a cross-site scripting (XSS) vulnerability when source code is entered into the header insertion field at the s/admin/entries/news/new URI.

Understanding CVE-2019-9554

Craft CMS 3.1.12 Pro version is vulnerable to XSS attacks when specific input is provided.

What is CVE-2019-9554?

Craft CMS 3.1.12 Pro version contains a security flaw that allows attackers to execute malicious scripts by injecting code into the header insertion field.

The Impact of CVE-2019-9554

This vulnerability could lead to unauthorized access, data theft, and potential compromise of the affected system.

Technical Details of CVE-2019-9554

Craft CMS 3.1.12 Pro version is susceptible to XSS attacks due to improper input validation.

Vulnerability Description

The XSS vulnerability in Craft CMS 3.1.12 Pro version allows attackers to inject and execute malicious scripts through the header insertion field.

Affected Systems and Versions

Product: Craft CMS
Version: 3.1.12 Pro

Exploitation Mechanism

Attackers can exploit this vulnerability by inserting malicious code into the header insertion field at the s/admin/entries/news/new URI.

Mitigation and Prevention

Immediate action is necessary to secure systems against potential attacks.

Immediate Steps to Take

Update Craft CMS to the latest patched version.
Avoid entering untrusted code into input fields.
Monitor and restrict access to vulnerable areas.

Long-Term Security Practices

Regularly update and patch software to address security vulnerabilities.
Implement input validation and sanitization to prevent XSS attacks.

Patching and Updates

Craft CMS users should apply the latest security patches and updates to mitigate the risk of XSS attacks.