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CVE-2026-13468 – Authorization Bypass – Visualizer Tables & Charts Manager WordPress Plugin (≤ 4….

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Summary

CVE-2026-13468 is a high-severity authorization bypass vulnerability (CVSS 7.5) in the Visualizer – Tables & Charts Manager with Built-in AI Generator WordPress plugin by ThemeIsle, affecting all versions up to and including 4.0.3. The flaw allows unauthenticated remote attackers to access and export the full contents of any chart managed by the plugin — regardless of publication status — by calling a plugin-registered REST API endpoint that entirely circumvents WordPress’s built-in access controls. The vendor released a patched version (4.0.4) on June 30, 2026.

Technical details

  • Root cause: The plugin registers a custom REST endpoint (/wp-json/visualizer/v1/action/{chart}/{type}/) that performs no authorization verification before returning chart data. This stands in contrast to the standard WordPress REST endpoint for the non-public visualizer custom post type, which correctly enforces capability checks and returns HTTP 401 to unauthenticated callers — a protection the plugin’s own route bypasses entirely.
  • Trigger conditions: The endpoint is publicly accessible on any internet-facing WordPress site running the plugin. No credentials, elevated privileges, or user interaction of any kind are required to exploit it.
  • Attack vector: An unauthenticated attacker sends a single HTTP request to /wp-json/visualizer/v1/action/{chart}/{type}/, supplying a chart ID and a desired export format (CSV, Excel, or HTML). The plugin responds with the full chart data without validating the caller’s identity or permissions.
  • Impact: Complete unauthorized access to the contents of any chart stored by the plugin, including charts in draft, private, pending, future, or trash status. Exposed data may include sensitive business, financial, or operational information that site administrators intended to keep non-public. There is no impact on integrity or availability (CVSS C:H/I:N/A:N).

Affected software

  • Visualizer – Tables & Charts Manager with Built-in AI Generator (vendor: ThemeIsle): all versions up to and including 4.0.3

Severity

  • CVSS v3.1 Base Score: 7.5 (HIGH)
  • Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Mitigation and recommended actions

  • Immediate action: Update the Visualizer plugin to version 4.0.4 or later, released by ThemeIsle on June 30, 2026, which resolves this authorization bypass.
  • If immediate patching is not feasible: Restrict access to the /wp-json/visualizer/ REST namespace at the web server or WAF level, or temporarily deactivate the plugin, until the update can be applied.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. Potentially affected assets are outlined in this post.

References

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