CVE-2025-11975: Fusewp – WordPress User Sync To Email List & Marketing Automation Mailchimp, Constant Contact, Activecampaign Etc

Medium severity, CVSS 4.3. EPSS: 0.2% chance of exploitation in the next 30 days.

The FuseWP – WordPress User Sync to Email List & Marketing Automation (Mailchimp, Constant Contact, ActiveCampaign etc.) plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the save_changes() function in all versions up to, and including, 1.1.23.0. This makes it possible for unauthenticated attackers to add and edit sync rules.

Affected products

• Fusewp Fusewp – WordPress User Sync To Email List & Marketing Automation Mailchimp, Constant Contact, Activecampaign Etc: up to and including 1.1.23.0

Published 2025-10-31. Last modified 2026-10-07.