Subscriber-level shortcode execution via unchecked preview action
Published Apr 8, 2026 · Updated Apr 8, 2026
Missing authorization in WP Blockade 0.9.14 and earlier allows remote authenticated users to execute arbitrary WordPress shortcodes. The wp-blockade-shortcode-render admin_post handler maps to render_shortcode_preview(), which removes slashes from the shortcode GET parameter and passes it directly to do_shortcode() without a capability check or nonce validation. Subscriber-level access is sufficient; resulting data exposure or privilege escalation depends on the shortcodes registered by the WordPress site.
Summary
What happened
Missing authorization in WP Blockade 0.9.14 and earlier allows remote authenticated users to execute arbitrary WordPress shortcodes. The wp-blockade-shortcode-render admin_post handler maps to render_shortcode_preview(), which removes slashes from the shortcode GET parameter and passes it directly to do_shortcode() without a capability check or nonce validation. Subscriber-level access is sufficient; resulting data exposure or privilege escalation depends on the shortcodes registered by the WordPress site.
The record
- CVE
- CVE-2026-3480
- Published
- Apr 8, 2026
- Updated
- Apr 8, 2026
- Vendor
- Bytes.co
- Product
- WP Blockade
- Classifications
- CWE-862, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 8, 2026CVE publishedPublication date reported by the CVE source.
- Apr 8, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <=0.9.14
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
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Technologies
Your stack
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Your stack
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