What the vulnerability does
01Description
The Chart Expert plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'pmzez_chart' shortcode in all versions up to, and including, 1.0. This is due to insufficient input sanitization and output escaping on user supplied shortcode attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Explanation of Vulnerability in Simple Terms
02Summary
Chart Expert versions 1.0 and earlier contain a cross-site scripting vulnerability that allows an attacker with low-level authentication to inject malicious scripts. The vulnerability has scope change, meaning the impact extends beyond the vulnerable component. An attacker can read or modify data accessible to other users on the affected site.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers and read or modify their data.
Potential impact on your site
04Site Impact
Authenticated users with low privileges can compromise other users' sessions and data integrity across the site.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege account on the site; no user interaction required.
Key dates
06Disclosure timeline
November 11, 2025
CVE published
April 8, 2026
Record updated
