CVE-2025-13950 MEDIUM

CVE-2025-13950: OneSignal – Web Push Notifications <= 3.6.1 - Missing Authorization to Unauthenticated Plugin Settings Update

Vendor Onesignal
Product OneSignal – Web Push Notifications
Weakness CWE-862 · Missing authorization
Published December 15, 2025
Last update April 8, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

What the vulnerability does

01Description

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.

Explanation of Vulnerability in Simple Terms

02Summary

OneSignal Web Push Notifications versions 3.6.1 and earlier lack proper authorization checks, allowing an unauthenticated attacker to modify push notification settings or content over the network. No user interaction is required. The vulnerability affects the integrity of notifications but not their confidentiality or system availability.

What an attacker can do

03Attacker Capabilities

Modify push notification settings or content without authentication.

Potential impact on your site

04Site Impact

Attackers can alter push notifications sent to your users, potentially spreading misinformation or malicious links.

Conditions required to exploit

05Prerequisites

Network access to the OneSignal service; no authentication or user interaction required.

Key dates

06Disclosure timeline

December 15, 2025 CVE published
April 8, 2026 Record updated