Known vulnerabilities in Klaviyo

Klaviyo for WooCommerce

2Reported vulnerabilities

4.8Highest CVSS score

3.8.3Latest version

100,000+Active installs

What to do now

Update Klaviyo to 3.0.10 or later. 2 of these have a fixed version available. Updating resolves them.

Plugin last updated: August 17, 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-2023-0874	Medium 4.8	0.4%	Before 3.0.10	`3.0.10`	April 10, 2023
CVE-2023-25456	Medium 4.4	0.4%	3.0.7 and earlier	`3.0.8`	March 13, 2023

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