CVE-2019-15827: Onesignal Onesignal-Free-Web-Push-Notifications

Medium severity, CVSS 5.4. EPSS: 1.1% chance of exploitation in the next 30 days.

The onesignal-free-web-push-notifications plugin before 1.17.8 for WordPress has XSS via the subdomain parameter.

Affected products

• Onesignal Onesignal-Free-Web-Push-Notifications: version 1.17.5 only

Published 2019-08-30. Last modified 2026-06-17.