CVE-2016-9849: phpMyAdmin

Critical severity, CVSS 9.8. EPSS: 2% chance of exploitation in the next 30 days.

An issue was discovered in phpMyAdmin. It is possible to bypass AllowRoot restriction ($cfg['Servers'][$i]['AllowRoot']) and deny rules for username by using Null Byte in the username. All 4.6.x versions (prior to 4.6.5), 4.4.x versions (prior to 4.4.15.9), and 4.0.x versions (prior to 4.0.10.18) are affected.

Affected products

• phpMyAdmin phpMyAdmin: version 4.0.0 only; version 4.0.1 only; version 4.0.2 only; version 4.0.3 only; version 4.0.4 only; version 4.0.4.1 only; …

Published 2016-12-11. Last modified 2026-06-17.