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WordPress plugin

MC4WP: Mailchimp for WordPress security & vulnerabilities

mailchimp-for-wp— active installsLast vulnerability Nov 6, 2026

No known unpatched vulnerabilities in the latest version

All 16 known vulnerabilities are fixed in the latest release. If you run an older version, update to null or newer.

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16Known vulnerabilities
  • Critical0
  • High1
  • Medium15
  • Low0
Vulnerabilities per year
2016: 1 vulnerability1162017: 1 vulnerability1172019: 1 vulnerability1192021: 2 vulnerabilities2212022: 2 vulnerabilities2222023: 1 vulnerability1232024: 2 vulnerabilities2242026: 6 vulnerabilities626

All MC4WP: Mailchimp for WordPress vulnerabilities

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MC4WP: Mailchimp for WordPress: common questions

Does MC4WP: Mailchimp for WordPress have known vulnerabilities?

Yes. VulnCrest Radar lists 16 known vulnerabilities in MC4WP: Mailchimp for WordPress: 1 high, 15 medium. None are known to affect version null.

How do I check which version of MC4WP: Mailchimp for WordPress I run?

In wp-admin open Plugins → Installed Plugins; the version is shown under the name. Without admin access, our passive Check my site tool can often read it from public files.

What is the most recent MC4WP: Mailchimp for WordPress vulnerability?

CVE-2026-27356, published Nov 6, 2026: MC4WP: Mailchimp for WordPress <= 4.14.1 - Missing Authorization. Severity: Medium (CVSS 5.3).

Is any MC4WP: Mailchimp for WordPress vulnerability listed in CISA KEV?

No. None of the known MC4WP: Mailchimp for WordPress vulnerabilities is currently listed in the CISA KEV catalog.

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