CVE-2020-5195 : What You Need to Know

Cerberus FTP Server prior to versions 11.0.1 and 10.0.17 is vulnerable to reflected XSS through an IMG element. This allows remote attackers to execute arbitrary JavaScript or HTML via a crafted public folder URL.

Understanding CVE-2020-5195

This CVE identifies a security vulnerability in Cerberus FTP Server that could be exploited by attackers to execute malicious scripts through specially crafted URLs.

What is CVE-2020-5195?

Reflected XSS vulnerability in Cerberus FTP Server allows remote attackers to run arbitrary JavaScript or HTML by manipulating folder paths in public folders.

The Impact of CVE-2020-5195

Attackers can execute arbitrary JavaScript or HTML by tricking users into clicking on malicious links.
The vulnerability affects users who interact with the compromised public folder URLs.

Technical Details of CVE-2020-5195

Cerberus FTP Server's vulnerability to reflected XSS can have severe consequences if exploited.

Vulnerability Description

The issue arises from the folder_up.png IMG element not properly sanitizing user-inserted directory paths.
Attackers can modify paths on publicly shared folders to inject malicious scripts.

Affected Systems and Versions

Cerberus FTP Server versions prior to 11.0.1 and 10.0.17 are vulnerable.
Users of these versions are at risk of exploitation through crafted public folder URLs.

Exploitation Mechanism

Remote attackers can manipulate folder paths in public folders to insert arbitrary JavaScript or HTML.
Users who click on the manipulated URLs are susceptible to the attack.

Mitigation and Prevention

Taking immediate steps and implementing long-term security practices are crucial to mitigating the risks associated with CVE-2020-5195.

Immediate Steps to Take

Update Cerberus FTP Server to versions 11.0.1 or 10.0.17 to patch the vulnerability.
Avoid clicking on suspicious or unverified URLs, especially those related to public folders.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Educate users about the risks of clicking on unknown or suspicious links.

Patching and Updates

Ensure that Cerberus FTP Server is kept up to date with the latest security patches.