CVE-2026-15000 json
Connect Contact Form 7 and Mailchimp <= 0.9.78.06 - Unauthenticated Stored Cross-Site Scripting via Mailchimp Merge Field Values
published 2026-07-09 4 mo ago modified 2026-07-09 4 mo ago also EUVD-2026-42523
- cvss
- 7.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 48%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.59% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
Affected products
- rnzo Connect Contact Form 7 and Mailchimp
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/be2579e3-8e40-4603-9ec1-38f43dc1aa29?source=cve
- plugins.trac.wordpress.org /browser/contact-form-7-mailchimp-extension/tags/0.9.78.05/assets/js/chimpmatic-lite.js#L1706
- plugins.trac.wordpress.org /browser/contact-form-7-mailchimp-extension/tags/0.9.78.05/includes/services/submission/class-cmatic-merge-var
- plugins.trac.wordpress.org /browser/contact-form-7-mailchimp-extension/tags/0.9.78.05/includes/api/class-cmatic-contact-lookup.php#L237
- plugins.trac.wordpress.org /browser/contact-form-7-mailchimp-extension/tags/0.9.78.05/assets/js/chimpmatic-lite.js#L2036
- plugins.trac.wordpress.org /browser/contact-form-7-mailchimp-extension/trunk/assets/js/chimpmatic-lite.js#L1706
- plugins.trac.wordpress.org /browser/contact-form-7-mailchimp-extension/trunk/includes/services/submission/class-cmatic-merge-vars-builder
- plugins.trac.wordpress.org /browser/contact-form-7-mailchimp-extension/trunk/includes/api/class-cmatic-contact-lookup.php#L237
- plugins.trac.wordpress.org /browser/contact-form-7-mailchimp-extension/trunk/assets/js/chimpmatic-lite.js#L2036
- plugins.trac.wordpress.org /changeset?reponame=&old=3599649%40contact-form-7-mailchimp-extension&new=3599649%40contact-form-7-mailchimp-e
Sources
- CVE List CVE-2026-15000
- NVD CVE-2026-15000
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.