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Vulnerability record · CVE-2026-15000 · published 9 July 2026

CVE-2026-15000: Cross-site scripting vulnerability

The Connect Contact Form 7 and Mailchimp plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Mailchimp Merge Field Values in all versions up to, and including, 0.9.78.06 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The injected payload is only triggered when a privileged user (Administrator) performs a Contact Lookup for the email address submitted via the CF7 form, meaning execution is deferred until an administrator interacts with the affected entry.

7.2 CVSS 3.1 High EPSS 0.59% · top 53.9% CWE-79 · Cross-site scripting Deferred
7.2CVSS 3.1 base score
0.59%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
10References
9 Jul 2026Last modified by NVD

Description

The Connect Contact Form 7 and Mailchimp plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Mailchimp Merge Field Values in all versions up to, and including, 0.9.78.06 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The injected payload is only triggered when a privileged user (Administrator) performs a Contact Lookup for the email address submitted via the CF7 form, meaning execution is deferred until an administrator interacts with the affected entry.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References

LinkTags
https://plugins.trac.wordpress.org/browser/contact-form-7-mailchimp-extension/tags/0.9.78.05/assets/js/chimpmatic-lite.j
https://plugins.trac.wordpress.org/browser/contact-form-7-mailchimp-extension/tags/0.9.78.05/assets/js/chimpmatic-lite.j
https://plugins.trac.wordpress.org/browser/contact-form-7-mailchimp-extension/tags/0.9.78.05/includes/api/class-cmatic-c
https://plugins.trac.wordpress.org/browser/contact-form-7-mailchimp-extension/tags/0.9.78.05/includes/services/submissio
https://plugins.trac.wordpress.org/browser/contact-form-7-mailchimp-extension/trunk/assets/js/chimpmatic-lite.js#L1706
https://plugins.trac.wordpress.org/browser/contact-form-7-mailchimp-extension/trunk/assets/js/chimpmatic-lite.js#L2036
https://plugins.trac.wordpress.org/browser/contact-form-7-mailchimp-extension/trunk/includes/api/class-cmatic-contact-lo
https://plugins.trac.wordpress.org/browser/contact-form-7-mailchimp-extension/trunk/includes/services/submission/class-c
https://plugins.trac.wordpress.org/changeset?reponame=&old=3599649%40contact-form-7-mailchimp-extension&new=3599649%40co
https://www.wordfence.com/threat-intel/vulnerabilities/id/be2579e3-8e40-4603-9ec1-38f43dc1aa29?source=cve

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Source: NIST National Vulnerability Database (record CVE-2026-15000), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.