CVE-2023-1259: Hotjar

Medium severity, CVSS 5.5. EPSS: 0.6% chance of exploitation in the next 30 days.

The Hotjar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the hotjar_site_id in versions up to, and including, 1.0.15 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Affected products

• Hotjar Hotjar: up to and including 1.0.15

Published 2023-10-14. Last modified 2026-06-17.