Is CVE-2026-8689 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-8689 being exploited in the wild.

How severe is CVE-2026-8689?

Medium severity, with a CVSS score of 4.3, published 28 May 2026.

Which products and versions are affected?

Themeisle Visualizer: Tables and Charts Manager for WordPress up to, and including, 3.11.14.

Is there a fix for CVE-2026-8689?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-8689 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-8689?

Check whether you run Themeisle Visualizer: Tables and Charts Manager for WordPress at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-8689: ThemeIsle Visualizer missing authorization in chart management functions

CVE-2026-8689 · Severity: medium · CVSS 4.3 · Published 2026-05-28

The Visualizer plugin for WordPress, which is used to create and manage interactive charts and tables, contains a security flaw that allows low-level users to perform administrative actions. An attacker with a basic subscriber account could create unauthorized chart posts or modify data belonging to other users, including site administrators. This could lead to unauthorized content changes and the corruption of existing data visualizations on the website.

Technologies: Themeisle Visualizer: Tables and Charts Manager for WordPress. Vendors: Themeisle.

Quick answers

Is CVE-2026-8689 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-8689 being exploited in the wild.
How severe is CVE-2026-8689?: Medium severity, with a CVSS score of 4.3, published 28 May 2026.
Which products and versions are affected?: Themeisle Visualizer: Tables and Charts Manager for WordPress up to, and including, 3.11.14.
Is there a fix for CVE-2026-8689?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-8689 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-8689?: Check whether you run Themeisle Visualizer: Tables and Charts Manager for WordPress at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is classified as Missing Authorization (CWE-862) within the renderChartPages() and uploadData() functions. The wp_ajax_visualizer-create-chart and wp_ajax_visualizer-edit-chart AJAX actions fail to implement current_user_can() checks, while the wp_ajax_visualizer-upload-data action lacks both capability checks and robust nonce validation. An authenticated attacker with Subscriber-level privileges can exploit these endpoints to create arbitrary chart posts or modify chart data belonging to other users. The issue affects all versions up to and including 3.11.14; a fix is available in subsequent versions.

Affected products

ThemeIsle Visualizer: Tables and Charts Manager for WordPress up to, and including, 3.11.14

Timeline

2026-05-28: disclosed
2026-05-28: advisory

References

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