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Vulnerability record · CVE-2020-20277 · published 18 December 2020

CVE-2020-20277: Troglobit uftpd path traversal vulnerability

Troglobit · Uftpd

There are multiple unauthenticated directory traversal vulnerabilities in different FTP commands in uftpd FTP server versions 2.7 to 2.10 due to improper implementation of a chroot jail in common.c's compose_abspath function that can be abused to read or write to arbitrary files on the filesystem, leak process memory, or potentially lead to remote code execution.

9.8 CVSS 3.1 Critical EPSS 26% · top 2.1% CWE-22 · Path traversal
9.8CVSS 3.1 base score, v2 7.5
26%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

There are multiple unauthenticated directory traversal vulnerabilities in different FTP commands in uftpd FTP server versions 2.7 to 2.10 due to improper implementation of a chroot jail in common.c's compose_abspath function that can be abused to read or write to arbitrary files on the filesystem, leak process memory, or potentially lead to remote code execution.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/167908/uftpd-2.10-Directory-Traversal.html ExploitThird Party AdvisoryVDB Entry
https://arinerron.com/blog/posts/6 Third Party Advisory
https://github.com/troglobit/uftpd/commit/455b47d3756aed162d2d0ef7f40b549f3b5b30fe PatchThird Party Advisory
http://packetstormsecurity.com/files/167908/uftpd-2.10-Directory-Traversal.html ExploitThird Party AdvisoryVDB Entry
https://arinerron.com/blog/posts/6 Third Party Advisory
https://github.com/troglobit/uftpd/commit/455b47d3756aed162d2d0ef7f40b549f3b5b30fe PatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2020-20276Troglobit uftpd out-of-bounds write vulnerabilityAn unauthenticated stack-based buffer overflow vulnerability in common.c's handle_PORT in uftpd FTP server versions 2.10 and earlier can be abused to…EPSS 3.4%8.8CVE-2020-5204Troglobit uftpd stack-based buffer overflow vulnerabilityIn uftpd before 2.11, there is a buffer overflow vulnerability in handle_PORT in ftpcmd.c that is caused by a buffer that is 16 bytes large being fil…EPSS 1.1%7.5CVE-2020-14149Troglobit uftpd null pointer dereference vulnerabilityIn uftpd before 2.12, handle_CWD in ftpcmd.c mishandled the path provided by the user, causing a NULL pointer dereference and denial of service, as d…EPSS 2.3%7.2CVE-2020-5221Troglobit uftpd path traversal vulnerabilityIn uftpd before 2.11, it is possible for an unauthenticated user to perform a directory traversal attack using multiple different FTP commands and re…EPSS 1.2%9.8CVE-2026-93616Checkpoint multi-domain security management path traversal vulnerabilityA directory traversal and file upload vulnerability allows an unauthenticated attacker to upload and execute arbitrary scripts on Check Point Managem…KEVEPSS 20%10.0CVE-2026-85706GitLab CE/EE repository commits API path traversal allows unauthenticated file readGitLab CE/EE contains improper path confinement and missing authentication enforcement in the repository commits API, allowing an unauthenticated use…KEVEPSS 91%analysed5.3CVE-2026-66384JFrog Artifactory path traversal in Docker cache pathAn authenticated user can write data outside the intended Docker cache path under specific remote-repository conditions in JFrog Artifactory. The fla…KEVEPSS 0.66%analysed9.8CVE-2026-59310VMware vCenter Syslog server path traversal leads to RCEVMware vCenter's Syslog server is affected by a directory traversal flaw (CWE-22) that allows a remote, unauthenticated attacker to execute arbitrary…KEVEPSS 2.6%analysed

Source: NIST National Vulnerability Database (record CVE-2020-20277), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.