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TI-2026-75204 Aliases CVE-2026-95809GHSA-gc4h-w8gx-jfq5

Stored DOM-based cross-site scripting in Opti-Behavior plugin

Priority LOW 31CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

The Opti-Behavior plugin for WordPress, in all versions up to and including 1.9.2.1, fails to sanitize input and escape output for the 'country_name' location parameter (CWE-79). An unauthenticated attacker can inject a script that is stored and runs in the browser of any user who opens an injected page. The heatmap recording endpoint accepts requests protected only by a nonce that any visitor can obtain through a public AJAX action.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00247 16th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
optiuserOpti-Behavior – Self-Hosted Heatmaps, Funnels, A/B Testing & Smart Insightsup to 1.9.2.1—No fix listedCNA
  • Opti-Behavior – Self-Hosted Heatmaps, Funnels, A/B Testing & Smart Insights Vendoroptiuser Affected up to 1.9.2.1 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Opti-Behavior.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-95809
  2. 2026-10-16 CISA SSVC decision points changed
  3. 2026-10-16 Priority changed: MEDIUM → LOW
  4. 2026-10-16 Alias added: GHSA-gc4h-w8gx-jfq5

References

Other 8

  • TI-2026-75203 Stored cross-site scripting in Opti-Behavior plugin for WordPress CVSS 3.1HIGH 7.2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences