CVE-2015-3903: libraries/Config.class.php in phpMyAdmin 4.0.x before 4.0.10.10, 4.2.x before 4.2.13.3, 4.3.x before 4.3.13.1,

Routine

MEDIUM 4.3DOWNGRADE

CVE-2015-3903 is a medium-severity flaw (CVSS 4.3) affecting phpmyadmin. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

libraries/Config.class.php in phpMyAdmin 4.0.x before 4.0.10.10, 4.2.x before 4.2.13.3, 4.3.x before 4.3.13.1, and 4.4.x before 4.4.6.1 disables X.509 certificate verification for GitHub API calls over SSL, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-310
Published	2015-05-26
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

2015-05-26 15:59 UTCPublished CVE record published
2026-06-17 00:26 UTCUpdated Record last modified

phpmyadmin phpmyadmin DOWNGRADE

Affected: 4.0.0 · 4.0.0 rc2 · 4.0.0 rc3 · 4.0.1 · 4.0.2 · 4.0.3 · 4.0.4 · 4.0.4.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.0.0 (Debian / Ubuntu)

apt-cache madison phpmyadmin sudo apt install phpmyadmin=<VERSION_BEFORE_4.0.0> sudo apt-mark hold phpmyadmin

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list phpmyadmin sudo dnf downgrade phpmyadmin-<VERSION_BEFORE_4.0.0> sudo dnf versionlock add phpmyadmin

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2015-3903?

phpmyadmin: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2015-3903 being exploited?

CVE-2015-3903 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-2015-3903 affect?

CVE-2015-3903 affects phpmyadmin. Severity is medium (CVSS 4.3). libraries/Config.class.php in phpMyAdmin 4.0.x before 4.0.10.10, 4.2.x before 4.2.13.3, 4.3.x before 4.3.13.1, and 4.4.x before 4.4.6.1 disables X.509 certificate verification for GitHub API calls over SSL, which allows man-in-the-middle at

How urgent is CVE-2015-3903?

Priority 39/100. Public exploit reference

Software pages

PHP vulnerabilities · GitHub vulnerabilities · phpMyAdmin vulnerabilities

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References

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