What’s Vulnerable › Vulnerabilities

CVE-2026-4086: WP Random Button <= 1.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'cat' Shortcode Attribute

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-21 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• newbiesup WP Random Button: through 1.0

References

• https://plugins.trac.wordpress.org/browser/wp-random-button/tags/1.0/wp-random-button.php#L46
• https://plugins.trac.wordpress.org/browser/wp-random-button/tags/1.0/wp-random-button.php#L50
• https://plugins.trac.wordpress.org/browser/wp-random-button/trunk/wp-random-button.php#L46
• https://plugins.trac.wordpress.org/browser/wp-random-button/trunk/wp-random-button.php#L50
• https://www.wordfence.com/threat-intel/vulnerabilities/id/0b9e11f5-5a05-4867-abd8-fb07c84a49b0?source=cve

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