# MC4WP Mailchimp for WordPress vulnerabilities

Source: https://junglewise.ai/threats/technologies/mailchimp-for-wordpress  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/mailchimp-for-wordpress.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in MC4WP Mailchimp for WordPress: 1 in the last 7 days and 3 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-118167, was published on 6 November 2026. 1 vulnerability in the last four weeks, level on the four before (1).

## Counts

- Last 7 days: 1
- Last 30 days: 1
- Last 90 days: 3
- All time: 3 (0 critical, 0 exploited in the wild)

## About MC4WP Mailchimp for WordPress

WordPress plugin for integrating and managing Mailchimp email marketing campaigns and mailing lists.

## Latest MC4WP Mailchimp for WordPress vulnerabilities

- [CVE-2026-118167: MC4WP: Mailchimp for WordPress audience validation bypass](https://junglewise.ai/threats/cve-2026-118167-the-mc4wp-mailchimp-for-wordpress-plugin-before-4-15-0-does-not) (info, published 6 Nov 2026)
- [CVE-2026-87917: MC4WP: Mailchimp for WordPress reflected cross-site scripting](https://junglewise.ai/threats/cve-2026-87917-the-mc4wp-mailchimp-for-wordpress-plugin-for-wordpress-is) (medium, CVSS 6.1, published 19 Sep 2026)
- [CVE-2026-4561: MC4WP: Mailchimp for WordPress stored cross-site scripting in form response messages](https://junglewise.ai/threats/cve-2026-4561-mc4wp-mailchimp-for-wordpress-stored-cross-site-scripting-in-form) (medium, CVSS 6.4, published 22 Aug 2026)

## Most severe MC4WP Mailchimp for WordPress vulnerabilities

- [CVE-2026-4561: MC4WP: Mailchimp for WordPress stored cross-site scripting in form response messages](https://junglewise.ai/threats/cve-2026-4561-mc4wp-mailchimp-for-wordpress-stored-cross-site-scripting-in-form) (medium, CVSS 6.4, published 22 Aug 2026)
- [CVE-2026-87917: MC4WP: Mailchimp for WordPress reflected cross-site scripting](https://junglewise.ai/threats/cve-2026-87917-the-mc4wp-mailchimp-for-wordpress-plugin-for-wordpress-is) (medium, CVSS 6.1, published 19 Sep 2026)
- [CVE-2026-118167: MC4WP: Mailchimp for WordPress audience validation bypass](https://junglewise.ai/threats/cve-2026-118167-the-mc4wp-mailchimp-for-wordpress-plugin-before-4-15-0-does-not) (info, published 6 Nov 2026)

## Vulnerabilities per week

1 vulnerability in the last four weeks, level on the four before (1).

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 1 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 1 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 1 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "MC4WP Mailchimp for WordPress vulnerabilities", https://junglewise.ai/threats/technologies/mailchimp-for-wordpress, 9 November 2026.