CVE-2026-27536

HighCVSS 7.1

Published: 13/08/2026(UTC)Updated: 14/08/2026(UTC)Translated: 13/08/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.18%

8th percentile - higher than 8% of all known CVEs

Summary

Unauthenticated Cross Site Scripting (XSS) in MailChimp Subscribe Forms versions up to 4.3.3. An attacker can inject malicious script without authentication.

Risk Assessment

Risk of session hijacking, admin account takeover, or malware distribution on the site.

Recommendation

Update the MailChimp Subscribe Forms plugin to the latest version that includes the security fix.

Original NVD description (English source)

Unauthenticated Cross Site Scripting (XSS) in MailChimp Subscribe Forms <= 4.3.3 versions.