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CVE-2026-16974— Kirki - Freeform Page Builder, Website Builder & Customizer <= 6.2.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via post_meta Shortcode

Quick assessment

Affected
themeum Kirki – Freeform Page Builder, Website Builder & Customizer
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 Kirki是WordPress基金会的一个内容管理系统主题定制组件。 WordPress Kirki 6.2.0及之前版本存在跨站脚本漏洞，该漏洞源于post_meta Shortcode的输入清理和输出转义不足，可能导致具有Contributor级及以上权限的认证攻击者注入任意Web脚本，在用户访问页面时执行。

CVSS 6.4 · Medium EPSS 0.26% · P16

Affected Version Matrix 1

VendorProduct Version RangeStatus
themeum Kirki – Freeform Page Builder, Website Builder & Customizer ≤ 6.2.0 affected
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I. Basic Information for CVE-2026-16974

Vulnerability Information
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Vulnerability Title
Kirki - Freeform Page Builder, Website Builder & Customizer <= 6.2.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via post_meta Shortcode
Source: CVE Program / CVE List V5
Vulnerability Description
The Kirki – Freeform Page Builder, Website Builder & Customizer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the post_meta Shortcode in all versions up to, and including, 6.2.0 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.
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
Vulnerability Title
WordPress Kirki 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Kirki是WordPress基金会的一个内容管理系统主题定制组件。 WordPress Kirki 6.2.0及之前版本存在跨站脚本漏洞，该漏洞源于post_meta Shortcode的输入清理和输出转义不足，可能导致具有Contributor级及以上权限的认证攻击者注入任意Web脚本，在用户访问页面时执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
themeum Kirki – Freeform Page Builder, Website Builder & Customizer 0 ~ 6.2.0 -

II. Public POCs for CVE-2026-16974

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III. Intelligence Information for CVE-2026-16974

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Patches & Fixes for CVE-2026-16974 (1)

Vendor Advisories for CVE-2026-16974 (1)

IV. Related Vulnerabilities

Same product: Kirki – Freeform Page Builder, Website Builder & Customizer
Same vendor: themeum
Same weakness: CWE-79

V. Comments for CVE-2026-16974

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