CVE-2018-17256 Explained : Impact and Mitigation
Learn about CVE-2018-17256, a persistent cross-site scripting (XSS) vulnerability in Umbraco CMS version 7.12.3. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
Umbraco CMS version 7.12.3 has a persistent cross-site scripting (XSS) vulnerability that allows authenticated users to inject arbitrary web scripts through the Header Name field of content types like Blogs and Content Pages.
Understanding CVE-2018-17256
This CVE involves a persistent XSS vulnerability in Umbraco CMS version 7.12.3.
What is CVE-2018-17256?
The vulnerability in Umbraco CMS version 7.12.3 enables authenticated users to insert malicious web scripts by manipulating the Header Name field in various content types, leading to a persistent cross-site scripting (XSS) threat.
The Impact of CVE-2018-17256
The exploit occurs when users update or remove public access to specific content items, potentially allowing attackers to execute arbitrary scripts within the context of the user's session.
Technical Details of CVE-2018-17256
This section provides more technical insights into the vulnerability.
Vulnerability Description
The XSS vulnerability in Umbraco CMS version 7.12.3 allows attackers to inject malicious scripts via the Header Name field of content types like Blogs and Content Pages.
Affected Systems and Versions
- Product: UmbracoCMS
- Vendor: CyberSecurity Philippines - CERT
- Affected Version: 7.12.3
Exploitation Mechanism
The vulnerability is exploited by authenticated users manipulating the Header Name field in various content types, enabling the injection of arbitrary web scripts.
Mitigation and Prevention
Protecting systems from CVE-2018-17256 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update Umbraco CMS to a patched version that addresses the XSS vulnerability.
- Educate users on safe content management practices to prevent script injections.
Long-Term Security Practices
- Regularly monitor and audit content for any suspicious scripts or activities.
- Implement content security policies to mitigate XSS risks.
Patching and Updates
Ensure timely installation of security patches and updates provided by UmbracoCMS to address the XSS vulnerability.