xootix Waitlist Woocommerce Plugin up to 2.9.1 on WordPress Shortcode type cross site scripting

Summaryinfo

A vulnerability was found in xootix Waitlist Woocommerce Plugin up to 2.9.1 and classified as problematic. This vulnerability affects unknown code of the component Shortcode Handler. Such manipulation of the argument Type leads to cross site scripting. This vulnerability is referenced as CVE-2026-77188. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in xootix Waitlist Woocommerce Plugin up to 2.9.1. It has been rated as problematic. Affected by this issue is an unknown code of the component Shortcode Handler. The manipulation of the argument type with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

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.

The advisory is shared for download at wordfence.com. This vulnerability is handled as CVE-2026-77188 since 08/20/2026. The exploitation is known to be easy. The attack may be launched remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Vendor

• xootix

Name

• Waitlist Woocommerce Plugin

Version

• 2.9.0
• 2.9.1

CPE 2.3info

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• 🔒

CPE 2.2info

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• 🔒

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Entryinfo

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