CVE-2026-77188
MediumCVSS 6.4Exploitation Probability (EPSS)
Low risk9th percentile - higher than 9% of all known CVEs
Summary
The Waitlist Woocommerce plugin for WordPress in versions up to and including 2.9.1 is vulnerable to stored cross-site scripting (XSS) via the 'type' shortcode attribute due to insufficient input sanitization and output escaping. Authenticated attackers with contributor-level access can inject arbitrary web scripts that execute when a user visits an injected page.
Risk Assessment
An attacker could execute arbitrary JavaScript in a user's browser, potentially leading to account takeover or other attacks. However, this requires content creation privileges.
Recommendation
Update the Waitlist Woocommerce plugin to a version later than 2.9.1. Additionally, consider restricting contributor permissions and implementing a Content Security Policy (CSP).
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

