CVE-2026-95809
CVE-2026-95809
The Opti-Behavior – Self-Hosted Heatmaps, Session Recordings, Funnels, A/B Testing & Smart Insights plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via 'country_name' Location Parameter in all versions up to, and including, 1.9.2.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The heatmap recording endpoint accepts unauthenticated requests protected only by a nonce that any visitor can freely obtain via the public opti_behavior_refresh_nonces AJAX action, removing any practical barrier to injecting the malicious payload.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/6c631593-4857-46c8-80b3-d0285…
- plugins.trac.wordpress.org/browser/opti-behavior/tags/1.9.0/assets/js/metabox-a…
- plugins.trac.wordpress.org/browser/opti-behavior/tags/1.9.0/admin/class-opti-be…
- plugins.trac.wordpress.org/browser/opti-behavior/tags/1.9.0/admin/class-opti-be…
- plugins.trac.wordpress.org/browser/opti-behavior/tags/1.9.0/includes/class-opti…
- plugins.trac.wordpress.org/browser/opti-behavior/tags/1.9.0/admin/class-opti-be…
- plugins.svn.wordpress.org/opti-behavior/
- plugins.trac.wordpress.org/changeset/3738510/opti-behavior/trunk/assets/js/meta…
Frequently asked questions
- What is CVE-2026-95809?
- CVE-2026-95809 is a high-severity vulnerability, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-10-16.
- How severe is CVE-2026-95809?
- High severity. CVSS v3 base score is 7.2 out of 10.