CVE-2023-25456: Klaviyo

Medium severity, CVSS 4.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Auth. (admin+) Stored Cross-Site Scripting (XSS) vulnerability in Klaviyo, Inc. Klaviyo plugin <= 3.0.7 versions.

Affected products

• Klaviyo Klaviyo: up to and including 3.0.7

Published 2023-03-23. Last modified 2026-06-17.