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7.1

MailChimp Subscribe Forms allows malicious scripts in inputs

CVE-2026-27536 · published 2 months ago
Summary

Old versions of MailChimp Subscribe Forms may allow hackers to inject malicious scripts into your website. This could let them steal sensitive information or take control of your site. To fix this, update to the latest version of MailChimp Subscribe Forms.

What to do
  • Update pluginops mailchimp subscribe forms to version 4.3.4.
Affected software
VendorProductAffected versions
pluginops mailchimp subscribe forms <= 4.3.3
Fix: upgrade to 4.3.4
Original advisory text
WordPress MailChimp Subscribe Forms plugin <= 4.3.3 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in MailChimp Subscribe Forms <= 4.3.3 versions.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
7.1 High
Exploitation
<1% chance of attack within 30 days
Type
CWE-79Cross-site Scripting (XSS)
Timeline
Published13 Aug 2026
Updated28 Oct 2026
First seen13 Aug 2026
Sources
CVE-2026-27536 · NVD
CVE-2026-27536 · MITRE
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