CVE-2019-19738 : Security Advisory and Response

MFScripts YetiShare versions 3.5.2 through 4.5.3 are vulnerable to a cross-site scripting (XSS) attack due to improper sanitization of user input.

Understanding CVE-2019-19738

This CVE identifies a security vulnerability in the log_file_viewer.php file of MFScripts YetiShare versions 3.5.2 through 4.5.3, allowing attackers to execute malicious scripts on the website.

What is CVE-2019-19738?

The vulnerability arises from the lack of proper sanitization or encoding of the output derived from the lFile parameter on the page, enabling attackers to insert HTML code or execute malicious scripts, commonly known as a cross-site scripting (XSS) attack.

The Impact of CVE-2019-19738

Attackers can exploit this vulnerability to inject malicious scripts or HTML code into the website, potentially leading to unauthorized access, data theft, or other malicious activities.

Technical Details of CVE-2019-19738

MFScripts YetiShare versions 3.5.2 through 4.5.3 are susceptible to the following:

Vulnerability Description

The log_file_viewer.php file fails to properly sanitize or encode the output from the lFile parameter, creating an XSS vulnerability.

Affected Systems and Versions

MFScripts YetiShare versions 3.5.2 through 4.5.3

Exploitation Mechanism

Attackers can exploit the vulnerability by manipulating the lFile parameter to inject malicious scripts or HTML code into the website.

Mitigation and Prevention

To address CVE-2019-19738, consider the following steps:

Immediate Steps to Take

Implement input validation and output encoding to prevent XSS attacks.
Regularly monitor and update the application to patch security vulnerabilities.

Long-Term Security Practices

Conduct regular security audits and penetration testing to identify and address potential vulnerabilities.
Educate developers on secure coding practices to prevent similar issues in the future.

Patching and Updates

Apply security patches and updates provided by MFScripts to mitigate the vulnerability and enhance overall system security.