OneSignal – Web Push Notifications <= 3.8.0 - Missing Authorization to Authenticated (Subscriber+) Post Meta Deletion via 'post_id'
Strategic Overview
- Status
- Patched in 3.8.1
- Affected Plugin
- OneSignal – Web Push Notifications
- Affected Version
<= 3.8.0- CVSS
- 3.1Low
- Weakness type
- CWE-862 · Missing Authorization
- CVE
CVE-2026-3155
At a glance
CVE-2026-3155 is a low-severity Missing Authorization vulnerability in the OneSignal WordPress plugin, affecting versions <= 3.8.0. It carries a CVSS score of 3.1 (reachable over the network). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 3.8.1; sites on affected versions should update now. Disclosed April 2026, reported by Muhammad Sharief.
Vulnerability Overview
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.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, and no interaction from a victim user.
CWE-862: Missing Authorization
Reaching this weakness in OneSignal <= 3.8.0 takes an account at Subscriber level or above. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.
Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For OneSignal the fix is 3.8.1: builds <= 3.8.0 are affected, anything from 3.8.1 onward is not.
Remediation
Update to version 3.8.1, or a newer patched version
How does WordSec protect against this?
Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: OneSignal 3.8.1 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in OneSignal – Web Push Notifications
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