CVE-2017-11593 : Security Advisory and Response
Learn about CVE-2017-11593, a Cross-site scripting (XSS) vulnerability in the Markdown Preview Plus extension for Chrome. Find out how attackers can inject malicious scripts and how to prevent exploitation.
The Markdown Preview Plus extension before version 0.5.7 for Chrome has a Cross-site scripting (XSS) vulnerability that allows attackers to inject malicious scripts into web applications when viewing specific file types.
Understanding CVE-2017-11593
What is CVE-2017-11593?
This vulnerability in the Markdown Preview Plus extension for Chrome enables attackers to insert harmful web scripts or HTML into certain web applications by uploading and viewing crafted text, markdown, or rst files in the browser.
The Impact of CVE-2017-11593
The vulnerability can lead to the execution of malicious code on the user's browser, potentially compromising sensitive information and user data.
Technical Details of CVE-2017-11593
Vulnerability Description
The XSS vulnerability in Markdown Preview Plus extension before 0.5.7 for Chrome allows remote attackers to inject arbitrary web script or HTML into web applications through improperly sanitized text, markdown, or rst files.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions: All versions before 0.5.7 are affected
Exploitation Mechanism
- Attackers exploit the vulnerability by uploading and viewing specially crafted text, markdown, or rst files that are meant to be displayed as plain text but are converted to HTML without proper sanitization.
Mitigation and Prevention
Immediate Steps to Take
- Update the Markdown Preview Plus extension to version 0.5.7 or newer to mitigate the vulnerability.
- Avoid opening untrusted text, markdown, or rst files from unknown or suspicious sources.
Long-Term Security Practices
- Regularly update browser extensions and plugins to the latest versions to patch security vulnerabilities.
- Educate users on safe browsing practices and the risks associated with opening files from untrusted sources.
Patching and Updates
- Stay informed about security updates for the Markdown Preview Plus extension and apply patches promptly to ensure protection against known vulnerabilities.