Known vulnerabilities in OneSignal – Web Push Notifications

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3Reported vulnerabilities

5.4Highest CVSS score

3.9.2Latest version

70,000+Active installs

What to do now

Update OneSignal – Web Push Notifications to 3.8.1 or later. 3 of these have a fixed version available. Updating resolves them.

Plugin last updated: July 2, 2026 / Tested up to WordPress: 7.0.4 / View on wordpress.org

Reported vulnerabilities

Ordered by how urgently they need attention — whether a vulnerability is actually being exploited, and how likely exploitation is, rather than CVSS severity alone.

CVE	Severity	Exploit probability next 30 days	Affected versions	Fixed in	Published
CVE-2019-15827	Medium 5.4	1.1%	1.17.5 to 1.17.5 (inclusive)	`1.17.8`	August 30, 2019
CVE-2025-13950	Medium 5.3	0.3%	3.6.1 and earlier	`3.6.2`	December 15, 2025
CVE-2026-3155	Low 3.1	0.3%	0 to 3.8.0 (inclusive)	`3.8.1`	April 16, 2026

Sources: vulnerability records from NVD, exploitation from CISA KEV, exploit probability from EPSS. Affected versions come from CPE ranges or from the reporting CNA.