Vulnerability · Published Sep 16, 2026 · Assigned by WPScan
CVE-2026-86784Visualizer < 4.0.8 - Contributor+ Stored XSS via JSON Data Source
Medium 6.8
In plain English
A medium-severity cross-site scripting in Visualizer from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).
Severity (CVSS 3.1)6.8Medium
Exploit odds (30 days)0.4%top 62.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
The Visualizer WordPress plugin before 4.0.8 does not sanitise and escape a chart's JSON data source configuration before outputting it back in the chart editor, allowing users with the Contributor role and above to store JavaScript that executes in the browser of any higher-privileged user, such as an administrator, who reviews the affected chart.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Unknown | Visualizer | 0 – before 4.0.8 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
References
- https://wpscan.com/vulnerability/9ac2d380-62fd-4967-8697-40175ffdf1c7/ exploit, vdb-entry, technical-description