CVE-2020-11705: An issue was discovered in ProVide (formerly zFTPServer) through 13.1

Q: How do I fix CVE-2020-11705?

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

Q: Is CVE-2020-11705 being exploited?

CVE-2020-11705 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-2020-11705 affect?

CVE-2020-11705 affects provide ftp server. Severity is critical (CVSS 9.8). An issue was discovered in ProVide (formerly zFTPServer) through 13.1. /ajax/ImportCertificate allows an attacker to load an arbitrary certificate in .pfx format or overwrite arbitrary files via the fileName parameter.

Q: How urgent is CVE-2020-11705?

Priority 59/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2020-11705 is a critical-severity flaw (CVSS 9.8) 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. /ajax/ImportCertificate allows an attacker to load an arbitrary certificate in .pfx format or overwrite arbitrary files via the fileName parameter.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-22
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-2020-11705?

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

Is CVE-2020-11705 being exploited?

CVE-2020-11705 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-2020-11705 affect?

CVE-2020-11705 affects provide ftp server. Severity is critical (CVSS 9.8). An issue was discovered in ProVide (formerly zFTPServer) through 13.1. /ajax/ImportCertificate allows an attacker to load an arbitrary certificate in .pfx format or overwrite arbitrary files via the fileName parameter.

How urgent is CVE-2020-11705?

Priority 59/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-11708 CRITICAL 9.8 UPGRADE An issue was discovered in ProVide (formerly zFTPServer) through 13.1
CVE-2020-11707 HIGH 8.8 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-2020-11704 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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