OneSignal – Web Push Notifications <= 3.6.1 - Missing Authorization to Unauthenticated Plugin Settings Update

Missing Authorization
CVE CVE-2025-13950
CVSS Medium (5.3)
Publicly Published December 15, 2025
Last Updated December 15, 2025
Researcher Marcin Dudek (dudekmar)
Description

The OneSignal – Web Push Notifications plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the settings handling functionality in all versions up to, and including, 3.6.1. This is due to the plugin processing POST requests without verifying user capabilities or nonces. This makes it possible for unauthenticated attackers to overwrite the OneSignal App ID, REST API key, and notification behavior via direct POST requests.

References

1 affected software package

Software Type Plugin
Software Slug onesignal-free-web-push-notifications (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 3.6.1
Patched Version
  • 3.6.2
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