What’s Vulnerable › Vulnerabilities

CVE-2020-5196

• Severity: high (CVSS 8.1 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: yes
• Published: 2020-01-14 · updated 2026-06-17
• Weakness: CWE-276

Description

Cerberus FTP Server Enterprise Edition prior to versions 11.0.3 and 10.0.18 allows an authenticated attacker to create files, display hidden files, list directories, and list files without the permission to zip and download (or unzip and upload) files. There are multiple ways to bypass certain permissions by utilizing the zip and unzip features. As a result, users without permission can see files, folders, and hidden files, and can create directories without permission.

Affected products

• Cerberus FTP Server: from 10.0.0 before 10.0.18; from 11.0.0 before 11.0.3 — fixed in 10.0.18, 11.0.3

How to fix

Upgrade to a fixed version: Cerberus FTP Server 10.0.18, 11.0.3. Check the vendor advisory for mitigations.

References

• https://support.cerberusftp.com/hc/en-us/community/topics/360000164199-Announcements
• https://www.cerberusftp.com/zip-unzip-permission-bypass-vulnerability-fixed-in-cerberus-ftp-server-versions-11-0-3-and-10-0-18/
• 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/zip-unzip-permission-bypass-vulnerability-fixed-in-cerberus-ftp-server-versions-11-0-3-and-10-0-18/
• https://www.doyler.net/security-not-included/cerberus-ftp-vulnerabilities

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