What’s Vulnerable › Vulnerabilities

CVE-2020-5195

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-01-13 · updated 2026-06-17
• Weakness: CWE-79

Description

Reflected XSS through an IMG element in Cerberus FTP Server prior to versions 11.0.1 and 10.0.17 allows a remote attacker to execute arbitrary JavaScript or HTML via a crafted public folder URL. This occurs because of the folder_up.png IMG element not properly sanitizing user-inserted directory paths. The path modification must be done on a publicly shared folder for a remote attacker to insert arbitrary JavaScript or HTML. The vulnerability impacts anyone who clicks the malicious link crafted by the attacker.

Affected products

• Cerberus FTP Server: from 10.0.0 before 10.0.17; from 11.0.0 before 11.0.1 — fixed in 10.0.17, 11.0.1

How to fix

Upgrade to a fixed version: Cerberus FTP Server 10.0.17, 11.0.1. Check the vendor advisory for mitigations.

References

• https://support.cerberusftp.com/hc/en-us/community/topics/360000164199-Announcements
• https://www.cerberusftp.com/xss-vulnerability-in-public-shares-fixed-in-cerberus-ftp-server-version-11-0-1-and-10-0-17/
• https://www.doyler.net/security-not-included/cerberus-ftp-vulnerabilities
• https://support.cerberusftp.com/hc/en-us/community/topics/360000164199-Announcements
• https://www.cerberusftp.com/xss-vulnerability-in-public-shares-fixed-in-cerberus-ftp-server-version-11-0-1-and-10-0-17/
• https://www.doyler.net/security-not-included/cerberus-ftp-vulnerabilities

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