What’s Vulnerable › Vulnerabilities

CVE-2023-1259: Hotjar <= 1.0.15 - Authenticated (Administrator+) Stored Cross-Site Scripting

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-10-14 · updated 2026-06-17
• Weakness: CWE-79

Description

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: through 1.0.15

References

• https://plugins.trac.wordpress.org/browser/hotjar/tags/1.0.14/includes/class-hotjar.php#L40
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2983524%40hotjar&new=2983524%40hotjar&sfp_email=&sfph_mail=
• https://www.wordfence.com/threat-intel/vulnerabilities/id/9c640bcb-b6bf-4865-b713-32ca846e4ed9?source=cve
• https://plugins.trac.wordpress.org/browser/hotjar/tags/1.0.14/includes/class-hotjar.php#L40
• https://www.wordfence.com/threat-intel/vulnerabilities/id/9c640bcb-b6bf-4865-b713-32ca846e4ed9?source=cve

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