Medium 6.1Published May 22, 2026

CVE-2026-3481WP Blockade <= 0.9.14 - Reflected Cross-Site Scripting via 'shortcode' Parameter

Updated under an hour ago (Oct 27, 2026, 4:20 AM ET)

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It affects burlingtonbytes WP Blockade – Visual Page Builder. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for burlingtonbytes WP Blockade – Visual Page Builder

Exploited in the last 30 days

The WP Blockade plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'shortcode' parameter in all versions up to and including 0.9.14. This is due to insufficient input sanitization and output escaping in the render_shortcode_preview() function. The function receives user input from $_GET['shortcode'], passes it through stripslashes() without any sanitization, and then outputs it directly via echo do_shortcode($shortcode) on line 393. When the input is not a valid WordPress shortcode (e.g., an HTML tag with JavaScript event handlers), do_shortcode() returns it unchanged, and it is reflected into the page without escaping. The endpoint is registered via admin_post_ (not admin_post_nopriv_), meaning it requires the user to be logged in with at minimum a Subscriber-level account. There is no nonce verification or additional capability check. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary web scripts in pages that will execute if they can successfully trick a user into performing an action such as clicking a link.

CVSS: 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Wordfence
NVD analysis: Deferred
Record last updated: May 22, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

burlingtonbytes WP Blockade – Visual Page Builder burlingtonbytes:wp_blockade_visual_page_builder (from the name)	through 0.9.14	CNA record

References

References

https://www.wordfence.com/threat-intel/vulnerabilities/id/66950509-ce2a-42fe-a8b2-2a92a1b573c3?source=cve
https://plugins.trac.wordpress.org/browser/wp-blockade/trunk/wp-blockade.php#L393
https://plugins.trac.wordpress.org/browser/wp-blockade/tags/0.9.14/wp-blockade.php#L393
https://plugins.trac.wordpress.org/browser/wp-blockade/trunk/wp-blockade.php#L360
https://plugins.trac.wordpress.org/browser/wp-blockade/tags/0.9.14/wp-blockade.php#L360

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.