OneSignal – Web Push Notifications: A security weakness
OneSignal – Web Push Notifications is affected by a security weakness. Exploitation requires at least subscriber-level access. The resulting impact depends on how the affected component exposes the vulnerable operation. The published affected range is <= 3.8.0.
- Component
- OneSignal – Web Push Notifications
- Plugin slug
onesignal-web-push-notifications- Affected
- <= 3.8.0
- Safe version
> 3.8.0- Published
- Apr 16, 2026
- Weakness
- CWE-862 — Missing Authorization
This CVE was published Apr 16, 2026 and is one of 2 known issues for this plugin.
Update, patch or deactivate.
Update OneSignal – Web Push Notifications to a release after 3.8.0, or disable and remove it until a fixed version is available.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
The OneSignal – Web Push Notifications plugin for WordPress is vulnerable to authorization bypass in versions up to, and including, 3.8.0. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to delete OneSignal metadata for arbitrary posts.
CVE / CNA vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N