XSS in Optiuser Opti-Behavior – Self-Hosted Heatmaps, Funnels, A/b Testing & Smart Insights

CVE-2026-95686

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 the 'targetUrl' 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 ingest endpoint is gated only by a nonce that is publicly emitted to every anonymous visitor on tracked pages via optiBehaviorHeatmapConfig.nonce, meaning no account or authentication of any kind is required to write 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.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-95686?
CVE-2026-95686 is a high-severity vulnerability in Optiuser Opti-Behavior – Self-Hosted Heatmaps, Funnels, A/b Testing & Smart Insights, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-10-16.
How severe is CVE-2026-95686?
High severity. CVSS v3 base score is 7.2 out of 10.