Threat intelligence

MC4WP: Mailchimp for WordPress <= 4.11.1 - Missing Authorization to Unauthenticated Arbitrary Subscription Deletion

CVE-2026-1781 · mailchimp-for-wp

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Mailchimp For Wp at a vulnerable version. How SiteRespond intelligence works

Vulnerability: MC4WP: Mailchimp for WordPress <= 4.11.1 - Missing Authorization to Unauthenticated Arbitrary Subscription Deletion
Affected software: mailchimp-for-wp(Plugin)
Affected versions: ≤ 4.11.1
Authentication: Unauthenticated
Vulnerability type: Other
CVE: CVE-2026-1781
Published: 10 March 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: This advisory describes a other issue in the affected software. Review the source advisory and your installed version to assess exposure.
Source: Data imported from Wordfence Intelligence (advisory 10262aa9-5656-4a2b-aeb5-060018798369). Methodology and redistribution notes

Check whether your installed version is affected

SiteRespond Defence matches your installed Mailchimp For Wp version against this catalog when the Defence plugin is connected to your WordPress site.

Start SiteRespond Defence for WordPress — £29.99/monthScan your website

All Mailchimp For Wp advisoriesBack to catalog