CVE-2015-5730: WordPress

Medium severity, CVSS 5.0. EPSS: 7.3% chance of exploitation in the next 30 days.

The sanitize_widget_instance function in wp-includes/class-wp-customize-widgets.php in WordPress before 4.2.4 does not use a constant-time comparison for widgets, which allows remote attackers to conduct a timing side-channel attack by measuring the delay before inequality is calculated.

Affected products

• WordPress WordPress: up to and including 4.2.3

Published 2015-11-09. Last modified 2026-06-17.