Live › vulnerability › CVE-2026-77188
Go to dashboardThe Waitlist WooCommerce (Back in stock notifier) WordPress plugin up to and including 2.9.1 does not sanitize or escape the 'type' attribute of its shortcode. A contributor-level user can store a script in a page that runs in the browser of anyone who views it.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-28 07:31 UTC. All times on this page are UTC.
WordPress sites running the Waitlist WooCommerce (Back in stock notifier) plugin at version 2.9.1 or older where contributor-level or higher accounts exist. The risk depends on a contributor being able to write pages that embed the shortcode. Sites without the plugin, or without contributor accounts, are not exposed to this path.
No product ranges from the sources yet.
wp plugin get waitlist-woocommerce --field=versionwp post list --post_type=page,post --format=ids | xargs -I{} wp post get {} --field=content | grep -i 'type=' (unknown whether this exact shortcode name is used by all installs)2.9.1 (the sources do not name the fixed version)Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
The Waitlist Woocommerce ( Back in stock notifier ) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'type' Shortcode Attribute in all versions up to, and including, 2.9.1 due to insufficient input sanitization and output escaping. 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. The wp_kses_post filter applied on contributor post save does not prevent this vulnerability because shortcode attribute values are not HTML and pass through kses unchanged; the payload is materialized only at render time when the shortcode is expanded.
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