OneSignal – Web Push Notifications vulnerabilities
Plugin slug onesignal-free-web-push-notifications · 3 known vulnerabilities · latest disclosed 2026-04-15 · WordPress.org page
Every listed vulnerability has a fix. Version 3.8.1 or later is not affected by any of them. If your site runs an older version, update it.
0 of 3 rated high or critical (CVSS 7 or more).
Known vulnerabilities in OneSignal – Web Push Notifications
| Severity | Affected versions | Fixed in | CVE | Published | Details |
|---|---|---|---|---|---|
| Low 3.1 | <= 3.8.0 | 3.8.1 | CVE-2026-3155 | 2026-04-15 | Advisory |
| Medium 5.3 | <= 3.6.1 | 3.6.2 | CVE-2025-13950 | 2025-12-15 | Advisory |
| Medium 6.4 | <= 1.17.7 | 1.17.8 | CVE-2019-15827 | 2019-07-18 | Advisory |
Check if a site is affected
Enter a site address to see which version of OneSignal – Web Push Notifications and other plugins it runs, and whether they match a known vulnerability.
Questions
Is the OneSignal – Web Push Notifications plugin safe to use?
All 3 known issues are fixed in current versions (3.8.1 or later). Keeping it updated is what matters.
How do I check which version of OneSignal – Web Push Notifications my site runs?
In WordPress go to Plugins > Installed Plugins. From the outside, the free PluginPeek scan below reads the version from the site's public files.
How do I fix a vulnerable plugin?
Make a full backup, then update it from Dashboard > Updates and check the site afterwards. If you would rather not, we can do it for a fixed $99, paid after you have checked the site.