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CVE-2026-115816— Kubio AI Page Builder <= 2.9.4 - Authenticated (Subscriber+) Stored Cross-Site Scripting via kubio/shortcode Block via Product Review

Quick assessment

Affected
extendthemes Kubio AI Page Builder
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 Kubio AI Page Builder 插件在所有 2.9.4 及更早版本中，由于输入清理和输出转义不足，存在存储型跨站脚本（Stored XSS）漏洞，攻击点位于"comment（评论/评价正文）”参数。该漏洞允许拥有订阅者及以上权限的已认证攻击者，在页面中注入任意网页脚本；当用户访问被注入的页面时，这些脚本将被执行。成功利用该漏洞需要满足以下条件：攻击者提交的包含恶意负载的评价必须获得批准（可因同一账户此前已获批准的评价而自动通过，或由管理员手动批准），并且当前使用的单产品模板必须包

CVSS 6.4 · Medium
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I. Basic Information for CVE-2026-115816

Vulnerability Information
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Vulnerability Title
Kubio AI Page Builder <= 2.9.4 - Authenticated (Subscriber+) Stored Cross-Site Scripting via kubio/shortcode Block via Product Review
Source: CVE Program / CVE List V5
Vulnerability Description
The Kubio AI Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment (review body)' parameter in all versions up to, and including, 2.9.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Successful exploitation requires the attacker's review containing the payload to be approved, either automatically (due to a previously approved review from the same account) or manually by an administrator, and the active single-product template must use a Kubio-rendered wp:post-content block.
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
extendthemes Kubio AI Page Builder 0 ~ 2.9.4 -

II. Public POCs for CVE-2026-115816

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III. Intelligence Information for CVE-2026-115816

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Other References for CVE-2026-115816 (5)

IV. Related Vulnerabilities

Same product: Kubio AI Page Builder
Same vendor: extendthemes
Same weakness: CWE-79