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CVE-2026-25863— Conditional Fields for Contact Form 7 < 2.7.3 DoS via Uncontrolled Resource Consumption

Quick assessment

Affected
Jules Colle Conditional Fields for Contact Form 7
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

CVSS 7.5 · High EPSS 0.60% · P48

Affected Version Matrix 1

VendorProduct Version RangeStatus
Jules Colle Conditional Fields for Contact Form 7 < 2.7.3 affected
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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: CVE Program / CVE List V5
Vulnerability Description
Conditional Fields for Contact Form 7 WordPress plugin through version 2.7.2 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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1284
Source: CVE Program / CVE List V5
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

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III. Intelligence Information for CVE-2026-25863

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Vendor Advisories for CVE-2026-25863 (1)

Vendor Pages for CVE-2026-25863 (1)

IV. Related Vulnerabilities

Same product: Conditional Fields for Contact Form 7
Same vendor: Jules Colle
Same weakness: CWE-1284

V. Comments for CVE-2026-25863

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