CVE-2025-13950 Vulnerability in OneSignal Plugin

The OneSignal Web Push Notifications plugin for WordPress has a significant vulnerability known as CVE-2025-13950. This vulnerability arises from a missing capability check during the settings handling, allowing unauthorized users to manipulate data. This issue affects all versions up to and including 3.6.1.

Understanding the Vulnerability

Due to improper handling of POST requests without verifying user capabilities or nonces, unauthenticated attackers can exploit this vulnerability. They can overwrite critical settings such as the OneSignal App ID, REST API key, and notification behavior. This threat makes it imperative for server administrators to be aware of plugin vulnerabilities that could compromise their applications.

Why This Matters for Server Admins

For system administrators and hosting providers, this vulnerability is particularly concerning. Attackers can use it as a gateway for further exploits, leading to potential data breaches or application manipulation. Regular monitoring and prompt updates are essential for maintaining server security. Leveraging a web application firewall can bolster defenses against possible brute-force attacks stemming from such vulnerabilities.

Mitigation Steps

Here are practical steps for mitigating the CVE-2025-13950 vulnerability:

• Update the OneSignal plugin to the latest version to ensure that the vulnerability is patched.
• Implement nonce checks for settings to verify requests properly.
• Regularly review user capabilities before processing any requests.
• Utilize security protocols to monitor all plugin settings for unauthorized changes.

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