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TI-2020-04277 Aliases CVE-2020-5221GHSA-f8pr-x4hc-3mhf

Directory Traversal (Chroot Escape) vulnerability in uftpd

Priority LOW 34CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

In uftpd before 2.11, it is possible for an unauthenticated user to perform a directory traversal attack using multiple different FTP commands and read and write to arbitrary locations on the filesystem due to the lack of a well-written chroot jail in compose_abspath(). This has been fixed in version 2.11

Why it matters now

EPSS 0.01162 67th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed uftpd (troglobit): 2.11

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
troglobituftpdbefore 2.112.11Patch availableCNA
  • uftpd Vendortroglobit Affected before 2.11 Fixed in 2.11 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:troglobit:uftpd:*:*:*:*:*:*:*:*before 2.11Vulnerabletroglobit
  • cpe:2.3:a:troglobit:uftpd:*:*:*:*:*:*:*:* Versions before 2.11 Vulnerable ·troglobit

Remediation

  • Fix · CNA uftpd (troglobit) Fixed in 2.11

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-5221
  2. 2026-10-03 Alias added: GHSA-f8pr-x4hc-3mhf

References

Exploit 1

Patch 1

  • TI-2020-13817 There are multiple unauthenticated directory traversal vulnerabilities in different FTP… CVSS 3.1CRITICAL 9.8
  • TI-2020-13816 An unauthenticated stack-based buffer overflow vulnerability in common.c's handle_PORT in… CVSS 3.1CRITICAL 9.8
  • TI-2020-04260 Buffer overflow vulnerability in uftpd CVSS 3.1HIGH 8.8
  • TI-2020-11077 In uftpd before 2.12, handle_CWD in ftpcmd.c mishandled the path provided by the user… CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences