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CVE-2026-5411— WP Captcha PRO <= 5.38 - Missing Authorization to Authenticated (Subscriber+) Arbitrary File Upload

CVSS 8.8 · High EPSS 0.46% · P36

Affected Version Matrix 1

VendorProductVersion RangeStatus
webfactoryAdvanced Google reCAPTCHA≤ 5.38affected
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I. Basic Information for CVE-2026-5411

Vulnerability Information
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Vulnerability Title
WP Captcha PRO <= 5.38 - Missing Authorization to Authenticated (Subscriber+) Arbitrary File Upload
Source: NVD (National Vulnerability Database)
Vulnerability Description
The WP Captcha PRO (the premium version of the Advanced Google reCAPTCHA plugin, both have the same slug) plugin for WordPress is vulnerable to arbitrary file upload in all versions up to, and including, 5.38. This is due to a capability check in the save_ajax() function of the licensing module, combined with unrestricted file extraction in sync_cloud_protection(). This makes it possible for authenticated attackers, with Subscriber-level access and above, to upload arbitrary files including PHP webshells to the server by injecting a malicious cloud_protection_url into the license meta, which the plugin then downloads and extracts without file type validation into a web-accessible uploads directory. This can be used for remote code execution. Note: The vulnerability can only be exploited with a remote URL if "allow_url_fopen" is enabled in the php.ini config.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
危险类型文件的不加限制上传
Source: NVD (National Vulnerability Database)
Vulnerability Title
WordPress plugin WP Captcha PRO 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin WP Captcha PRO 5.38及之前版本存在代码问题漏洞，该漏洞源于save_ajax函数中能力检查不足，结合sync_cloud_protection中未限制的文件提取，可能导致经过身份验证的攻击者上传任意
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

VendorProductAffected VersionsCPESubscribe
webfactoryAdvanced Google reCAPTCHA 0 ~ 5.38 -

II. Public POCs for CVE-2026-5411

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III. Intelligence Information for CVE-2026-5411

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Security Blog Posts for CVE-2026-5411 (1)

Vendor Pages for CVE-2026-5411 (1)

IV. Related Vulnerabilities

Same product: Advanced Google reCAPTCHA
Same vendor: webfactory
Same weakness: CWE-434

V. Comments for CVE-2026-5411

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