CVE-2026-25863— Conditional Fields for Contact Form 7 < 2.7.3 DoS via Uncontrolled Resource Consumption
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I. Basic Information for CVE-2026-25863
Vulnerability Information
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Vulnerability Title
Conditional Fields for Contact Form 7 < 2.7.3 DoS via Uncontrolled Resource Consumption
Source: NVD (National Vulnerability Database)
Vulnerability Description
Conditional Fields for Contact Form 7 WordPress plugin through version 2.6.7 contains an uncontrolled resource consumption vulnerability in the Wpcf7cfMailParser class where the hide_hidden_mail_fields_regex_callback() method reads an iteration count directly from user-supplied POST parameters without validation or upper bound enforcement. Unauthenticated attackers can supply an arbitrarily large integer value through the REST API endpoint to cause unbounded loop execution with multiple preg_replace() operations, exhausting server memory and crashing the PHP process.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1284
Source: NVD (National Vulnerability Database)
Vulnerability Title
WordPress plugin Conditional Fields for Contact Form 安全漏洞
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 Conditional Fields for Contact Form 7 2.6.7及之前版本存在安全漏洞，该漏洞源于Wpcf7cfMailParser类中的hide_hidden_mail_fields_rege
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 |
|---|---|---|---|---|
| Jules Colle | Conditional Fields for Contact Form 7 | 0 ~ 2.7.3 | - |
II. Public POCs for CVE-2026-25863
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
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