CVE-2026-4086 WP Random Button <= 1.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'cat' Shortcode Attribute
Authenticated attackers can inject arbitrary scripts via shortcode attributes, leading to code execution in victim browsers.
- 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-2026-4086?
CVE-2026-4086 is a medium-severity cross-site scripting vulnerability in newbiesup WP Random Button, published on 21 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The WP Random Button plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'cat', 'nocat', and 'text' shortcode attributes of the 'wp_random_button' 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. Specifically, the random_button_html() function directly concatenates the 'cat' and 'nocat' parameters into HTML data-attributes without esc_attr(), and the 'text' parameter into HTML content without esc_html(). 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-2026-4086?
How do I fix CVE-2026-4086?
No fix has been published for CVE-2026-4086 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-2026-4086 being exploited?
There is no known exploitation of CVE-2026-4086 in the wild and no public exploit code.
Sources
Also known as GHSA-x5f6-m38m-6rp5.