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CVE-2026-104734— Kirki <= 6.3.2 - Authenticated (Administrator+) PHP Object Injection via Deserialization of Untrusted Input via ZIP Template Import

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 插件"Kirki – Freeform Page Builder, Website Builder & Customizer"在所有 6.3.2 及以下版本中存在 PHP 对象注入漏洞，该漏洞源于对不可信输入的反序列化操作。这使得拥有管理员及以上权限的已认证攻击者能够注入 PHP 对象。目前，受影响的软件本身不存在已知利用链（POP chain），因此该漏洞本身不会造成直接危害，除非目标站点同时安装了包含 POP chain 的其他插件或主题。若目标系统中通过额外安装的插件或主题引入了 POP

CVSS 7.2 · High
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I. Basic Information for CVE-2026-104734

Vulnerability Information
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Vulnerability Title
Kirki <= 6.3.2 - Authenticated (Administrator+) PHP Object Injection via Deserialization of Untrusted Input via ZIP Template Import
Source: CVE Program / CVE List V5
Vulnerability Description
The Kirki – Freeform Page Builder, Website Builder & Customizer plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 6.3.2 via deserialization of untrusted input . This makes it possible for authenticated attackers, with administrator-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present. By default, Editor-level users are granted FULL_ACCESS to the plugin's import endpoint via the KIRKI_USERS_DEFAULT_FULL_ACCESS configuration, meaning exploitation is possible at Editor privilege level rather than being restricted to administrators alone.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
themeum Kirki – Freeform Page Builder, Website Builder & Customizer 0 ~ 6.3.2 -

II. Public POCs for CVE-2026-104734

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III. Intelligence Information for CVE-2026-104734

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Patches & Fixes for CVE-2026-104734 (1)

Vendor Pages for CVE-2026-104734 (2)

Same Patch Batch · themeum · 2026-10-17 · 3 CVEs total

CVE-2026-107762 7.5 HIGH Kirki <= 6.3.2 - Insecure Direct Object Reference to Unauthenticated Sensitive Information
CVE-2026-92715 4.3 MEDIUM Tutor LMS <= 4.1.0 - Insecure Direct Object Reference to Authenticated (Author+) Arbitrary

IV. Related Vulnerabilities

Same product: Kirki – Freeform Page Builder, Website Builder & Customizer
Same vendor: themeum
Same weakness: CWE-502

V. Comments for CVE-2026-104734

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