CVE-2026-9729

Description

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.

References

• https://plugins.trac.wordpress.org/browser/webpushr-web-push-notifications/trunk/include/webpushr_functions.php#L513
• https://plugins.trac.wordpress.org/browser/webpushr-web-push-notifications/trunk/include/webpushr_functions.php#L517
• https://plugins.trac.wordpress.org/browser/webpushr-web-push-notifications/trunk/include/webpushr_functions.php#L699
• https://plugins.trac.wordpress.org/browser/webpushr-web-push-notifications/trunk/include/webpushr_functions.php#L702
• https://www.wordfence.com/threat-intel/vulnerabilities/id/39286096-2efa-450b-b491-b3d40de5a4ae?source=cve