CVE-2026-8689

Visualizer: Tables and Charts Manager for WordPress <= 3.11.14 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Chart Creation and Modification via renderChartPages() and uploadData() Functions

2026-05-27 19:31
davidfdzmorilla

Strategic Overview

Status
Patched in 3.11.15
Affected Plugin
Visualizer – Tables & Charts Manager with Built-in AI Generator
Affected Version
<= 3.11.14
CVSS
4.3Medium
Weakness type
CWE-862 · Missing Authorization
CVE
CVE-2026-8689
View all Visualizer – Tables & Charts Manager with Built-in AI Generator vulnerabilities

At a glance

CVE-2026-8689 is a medium-severity Missing Authorization vulnerability in the Visualizer WordPress plugin, affecting versions <= 3.11.14. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 3.11.15; sites on affected versions should update now. Disclosed May 2026, reported by davidfdzmorilla.

Vulnerability Overview

The Visualizer: Tables and Charts Manager for WordPress plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 3.11.14. This is due to a missing capability check on the renderChartPages() and uploadData() functions, where the wp_ajax_visualizer-create-chart and wp_ajax_visualizer-edit-chart AJAX actions invoke renderChartPages() without any current_user_can() check, and wp_ajax_visualizer-upload-data invokes uploadData() which also lacks a capability check and validates its nonce without an action argument, making it trivially bypassable. This makes it possible for authenticated attackers, with Subscriber-level access and above, to create arbitrary chart posts and access or modify chart data belonging to other users, including administrators.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-862: Missing Authorization

Visualizer <= 3.11.14 carries this weakness at renderChartPages(), and reaching it takes an account at Subscriber level or above. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Visualizer the fix is 3.11.15: builds <= 3.11.14 are affected, anything from 3.11.15 onward is not.

Remediation

Update to version 3.11.15, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Visualizer 3.11.15 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-8689https://www.wordfence.com/threat-intel/vulnerabilities/id/d18e9696-0f96-4478-9871-a93ac2976c11https://nvd.nist.gov/vuln/detail/CVE-2026-8689

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C