CVE-2020-11707: An issue was discovered in ProVide (formerly zFTPServer) through 13.1

Q: How do I fix CVE-2020-11707?

provide ftp server: upgrade to newer than 13.1. Exact commands for each OS are on this page.

Q: Is CVE-2020-11707 being exploited?

CVE-2020-11707 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-11707 affect?

CVE-2020-11707 affects provide ftp server. Severity is high (CVSS 8.8). An issue was discovered in ProVide (formerly zFTPServer) through 13.1. It doesn't enforce permission over Windows Symlinks or Junctions. As a result, a low-privileged user (non-admin) can craft a Junction Link in a directory he has full con

Q: How urgent is CVE-2020-11707?

Priority 52/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADE

CVE-2020-11707 is a high-severity flaw (CVSS 8.8) affecting provide ftp server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in ProVide (formerly zFTPServer) through 13.1. It doesn't enforce permission over Windows Symlinks or Junctions. As a result, a low-privileged user (non-admin) can craft a Junction Link in a directory he has full control of, breaking out of the sandbox.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-863
Published	2020-04-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: provideserver

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-04-12 03:15 UTCPublished CVE record published
2026-06-17 02:50 UTCUpdated Record last modified

provideserver provide ftp server UPGRADE

Affected: <= 13.1

Fixed in: newer than 13.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy provide-ftp-server || rpm -q provide-ftp-server || provide-ftp-server --version

2. UPGRADE to newer than 13.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade provide-ftp-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade provide-ftp-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-11707?

provide ftp server: upgrade to newer than 13.1. Exact commands for each OS are on this page.

Is CVE-2020-11707 being exploited?

CVE-2020-11707 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-11707 affect?

CVE-2020-11707 affects provide ftp server. Severity is high (CVSS 8.8). An issue was discovered in ProVide (formerly zFTPServer) through 13.1. It doesn't enforce permission over Windows Symlinks or Junctions. As a result, a low-privileged user (non-admin) can craft a Junction Link in a directory he has full con

How urgent is CVE-2020-11707?

Priority 52/100. High severity; Public exploit reference

Software pages

Windows vulnerabilities

Related CVEs

CVE-2020-11708 CRITICAL 9.8 UPGRADE An issue was discovered in ProVide (formerly zFTPServer) through 13.1
CVE-2020-11706 HIGH 8.8 UPGRADE An issue was discovered in ProVide (formerly zFTPServer) through 13.1
CVE-2020-11705 CRITICAL 9.8 UPGRADE An issue was discovered in ProVide (formerly zFTPServer) through 13.1
CVE-2020-11704 MEDIUM 6.1 UPGRADE An issue was discovered in ProVide (formerly zFTPServer) through 13.1
CVE-2020-11703 HIGH 7.5 UPGRADE An issue was discovered in ProVide (formerly zFTPServer) through 13.1

References

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