CVE-2018-6806 Explained : Impact and Mitigation

Marked versions 2 to 2.5.11 have a vulnerability that allows unauthorized access to files through manipulated HTML documents.

Understanding CVE-2018-6806

Marked 2 through 2.5.11 is susceptible to a security flaw that can be exploited by malicious actors to view arbitrary files by redirecting to a specific URL.

What is CVE-2018-6806?

Marked versions 2 to 2.5.11 are affected by a vulnerability that enables attackers to access and view any file by utilizing a manipulated HTML document that triggers a redirect to an x-marked://preview?text= URL. The text parameter within the URL can contain unrestricted JavaScript code, such as executing XMLHttpRequest calls.

The Impact of CVE-2018-6806

This vulnerability allows remote attackers to read arbitrary files, potentially leading to unauthorized access to sensitive information.

Technical Details of CVE-2018-6806

Marked 2 through 2.5.11 vulnerability details.

Vulnerability Description

The flaw in Marked versions 2 to 2.5.11 allows remote attackers to read arbitrary files through a crafted HTML document that redirects to a specific URL.

Affected Systems and Versions

Marked versions 2 to 2.5.11

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating HTML documents to trigger a redirect to a specific URL, enabling access to arbitrary files.

Mitigation and Prevention

Steps to address and prevent CVE-2018-6806.

Immediate Steps to Take

Update Marked to a secure version that addresses the vulnerability.
Avoid clicking on suspicious links or opening files from untrusted sources.

Long-Term Security Practices

Regularly update software to the latest secure versions.
Implement proper input validation to prevent malicious redirections.

Patching and Updates

Apply patches provided by Marked to fix the vulnerability and enhance security.