CVE-2026-4011 Power Charts <= 0.1.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'id' Shortcode Attribute

Q: What is CVE-2026-4011?

CVE-2026-4011 is a medium-severity cross-site scripting vulnerability in dgwyer Power Charts – Responsive Beautiful Charts & Graphs, published on 15 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Q: Is CVE-2026-4011 being exploited?

There is no known exploitation of CVE-2026-4011 in the wild and no public exploit code.

Q: How do I fix CVE-2026-4011?

No fix has been published for CVE-2026-4011 yet. Limit exposure of the affected software until one is available.

Medium 6.4 Published 15 Apr 2026 Updated 15 Apr 2026

Authenticated attackers with Contributor access can inject arbitrary scripts via the 'id' shortcode attribute, leading to stored XSS execution on victim pages.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-4011?

CVE-2026-4011 is a medium-severity cross-site scripting vulnerability in dgwyer Power Charts – Responsive Beautiful Charts & Graphs, published on 15 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

The Power Charts Lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'id' parameter of the [pc] shortcode in all versions up to, and including, 0.1.0. This is due to insufficient input sanitization and output escaping on the 'id' shortcode attribute. Specifically, in the pc_shortcode() function, the 'id' attribute is extracted from user-supplied shortcode attributes and directly concatenated into an HTML div element's class attribute without any escaping or sanitization at line 62. The resulting HTML is then passed through html_entity_decode() before being returned, further undermining any potential safety. 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.

Weakness: CWE-79

Which versions are affected by CVE-2026-4011?

How do I fix CVE-2026-4011?

No fix has been published for CVE-2026-4011 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-4011 being exploited?