CVE-2015-8834: WordPress

Medium severity, CVSS 6.1. EPSS: 1.8% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in wp-includes/wp-db.php in WordPress before 4.2.2 allows remote attackers to inject arbitrary web script or HTML via a long comment that is improperly stored because of limitations on the MySQL TEXT data type. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-3440.

Affected products

• WordPress WordPress: up to and including 4.2.1

Published 2016-05-22. Last modified 2026-06-17.