CVE-2026-9729: Webpushr Web Push Notifications – Webpushr

Medium severity, CVSS 6.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The Webpushr Push Notifications plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'webpushr_notification_title' and 'webpushr_notification_body' parameters in versions up to, and including, 4.39.0. This is due to insufficient input sanitization in the save_send_notification_flag() function and missing output escaping in the wpp_notification_box() function, which concatenates raw post meta values directly into HTML attribute and textarea contexts. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

• Webpushr Web Push Notifications – Webpushr: up to and including 4.39.0

Published 2026-07-23. Last modified 2026-07-23.