Auth bypass in Cerberusftp FTP Server
CVE-2020-5194
The zip API endpoint in Cerberus FTP Server 8 allows an authenticated attacker without zip permission to use the zip functionality via an unrestricted API endpoint. Improper permission verification occurs when calling the file/ajax_download_zip/zip_name endpoint. The result is that a user without permissions can zip and download files even if they do not have permission to view whether the file exists.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.007 (51.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Cerberusftp FTP Server — versions 8.0
Weakness classification (CWE)
References
- support.cerberusftp.com/hc/en-us/community/topics/360000164199-Announcements (Vendor Advisory)
- www.doyler.net/security-not-included/cerberus-ftp-vulnerabilities (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-5194?
- CVE-2020-5194 is a medium-severity vulnerability in Cerberusftp FTP Server, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.4/10. Published 2020-01-14.
- How severe is CVE-2020-5194?
- Medium severity. CVSS v3 base score is 5.4 out of 10.