What’s Vulnerable › Vulnerabilities
CVE-2026-4088: Switch CTA Box <= 1.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode
- Severity: medium (CVSS 6.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-04-22 · updated 2026-06-17
- Weakness: CWE-79
Description
The Switch CTA Box plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'wppw_cta_box' shortcode in all versions up to, and including, 1.1. This is due to insufficient input sanitization and output escaping on user-supplied post meta values including 'cta_box_button_link', 'cta_box_button_id', 'cta_box_button_text', and 'cta_box_description'. The shortcode reads post meta from a user-specified post ID and echoes these values directly into HTML output without any escaping functions (no esc_attr(), esc_url(), or 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
- wpshouter Switch CTA Box: through 1.1
References
- https://plugins.trac.wordpress.org/browser/switch-cta-box/tags/1.1/inc/box_display_template.php#L14
- https://plugins.trac.wordpress.org/browser/switch-cta-box/tags/1.1/inc/box_display_template.php#L18
- https://plugins.trac.wordpress.org/browser/switch-cta-box/tags/1.1/inc/box_display_template.php#L2
- https://plugins.trac.wordpress.org/browser/switch-cta-box/tags/1.1/inc/shortcode_setup.php#L8
- https://plugins.trac.wordpress.org/browser/switch-cta-box/trunk/inc/box_display_template.php#L14
- https://plugins.trac.wordpress.org/browser/switch-cta-box/trunk/inc/box_display_template.php#L18
- https://plugins.trac.wordpress.org/browser/switch-cta-box/trunk/inc/box_display_template.php#L2
- https://plugins.trac.wordpress.org/browser/switch-cta-box/trunk/inc/shortcode_setup.php#L8
- https://www.wordfence.com/threat-intel/vulnerabilities/id/19a3fc90-b81c-4451-80e0-cead99a2dcd9?source=cve
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