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CVE-2026-77188— Waitlist Woocommerce ( Back in stock notifier ) <= 2.9.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'type' Shortcode Attribute

Quick assessment

Affected
xootix Waitlist Woocommerce ( Back in stock notifier )
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 的 Waitlist WooCommerce（库存恢复通知器）插件在所有 2.9.1 及以下版本中，因输入净化不足和输出转义缺失，存在通过"Shortcode 属性 "引发的存储型跨站脚本（Stored XSS）漏洞。该漏洞使得拥有贡献者（contributor）及以上权限的已认证攻击者，能够在页面中注入任意 Web 脚本；当用户访问被注入的页面时，这些脚本将被执行。 尽管在贡献者保存文章时应用了 过滤器，但该过滤器无法阻止此漏洞，因为 Shortcode 属性值并非 HTML 内容，会原样通过

CVSS 6.4 · Medium EPSS 0.19% · P9

Affected Version Matrix 1

VendorProduct Version RangeStatus
xootix Waitlist Woocommerce ( Back in stock notifier ) ≤ 2.9.1 affected
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I. Basic Information for CVE-2026-77188

Vulnerability Information
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Vulnerability Title
Waitlist Woocommerce ( Back in stock notifier ) <= 2.9.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'type' Shortcode Attribute
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
xootix Waitlist Woocommerce ( Back in stock notifier ) 0 ~ 2.9.1 -

II. Public POCs for CVE-2026-77188

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III. Intelligence Information for CVE-2026-77188

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Patches & Fixes for CVE-2026-77188 (1)

Vendor Advisories for CVE-2026-77188 (1)

Vendor Pages for CVE-2026-77188 (2)

Other References for CVE-2026-77188 (1)

IV. Related Vulnerabilities

Same product: Waitlist Woocommerce ( Back in stock notifier )
Same vendor: xootix
Same weakness: CWE-79