CVE-2016-9866: phpMyAdmin

Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days.

An issue was discovered in phpMyAdmin. When the arg_separator is different from its default & value, the CSRF token was not properly stripped from the return URL of the preference import action. 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 4.6.0 only; version 4.6.1 only; version 4.6.2 only; version 4.6.3 only; version 4.6.4 only; version 4.4.0 only; …

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