CVE-2016-6621: The setup script for phpMyAdmin before 4.0.10.19, 4.4.x before 4.4.15.10, and 4.6.x before 4.6.6 allows remote

Q: How do I fix CVE-2016-6621?

phpmyadmin: upgrade to newer than 4.0.10.18. Exact commands for each OS are on this page.

Q: Is CVE-2016-6621 being exploited?

CVE-2016-6621 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-2016-6621 affect?

CVE-2016-6621 affects phpmyadmin. Severity is high (CVSS 8.6). The setup script for phpMyAdmin before 4.0.10.19, 4.4.x before 4.4.15.10, and 4.6.x before 4.6.6 allows remote attackers to conduct server-side request forgery (SSRF) attacks via unspecified vectors.

Q: How urgent is CVE-2016-6621?

Priority 55/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 8.6REMOTEUPGRADE

CVE-2016-6621 is a high-severity flaw (CVSS 8.6) affecting phpmyadmin. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The setup script for phpMyAdmin before 4.0.10.19, 4.4.x before 4.4.15.10, and 4.6.x before 4.6.6 allows remote attackers to conduct server-side request forgery (SSRF) attacks via unspecified vectors.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.6 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-918
Published	2017-01-31
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: phpmyadmin

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

Am I affected?

Timeline

2017-01-31 19:59 UTCPublished CVE record published
2026-06-17 00:51 UTCUpdated Record last modified

phpmyadmin phpmyadmin UPGRADE

Affected: <= 4.0.10.18 · 4.4.0 · 4.4.1 · 4.4.1.1 · 4.4.2 · 4.4.3 · 4.4.4 · 4.4.5

Fixed in: newer than 4.0.10.18

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy phpmyadmin || rpm -q phpmyadmin || phpmyadmin --version

2. UPGRADE to newer than 4.0.10.18 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade phpmyadmin

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade phpmyadmin

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-2016-6621?

phpmyadmin: upgrade to newer than 4.0.10.18. Exact commands for each OS are on this page.

Is CVE-2016-6621 being exploited?

CVE-2016-6621 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-2016-6621 affect?

CVE-2016-6621 affects phpmyadmin. Severity is high (CVSS 8.6). The setup script for phpMyAdmin before 4.0.10.19, 4.4.x before 4.4.15.10, and 4.6.x before 4.6.6 allows remote attackers to conduct server-side request forgery (SSRF) attacks via unspecified vectors.

How urgent is CVE-2016-6621?

Priority 55/100. High severity; Remotely exploitable, no login, no user action

Software pages

phpMyAdmin vulnerabilities

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References

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