FuseWP – WordPress User Sync to Email List & Marketing Automation (Mailchimp, Constant Contact, ActiveCampaign etc.) <= 1.1.23.0 - Missing Authorization to Authenticated (Subscriber+) Sync Rule Creation

Missing Authorization
CVE CVE-2025-11975
CVSS Medium (4.3)
Publicly Published October 30, 2025
Last Updated October 31, 2025
Researcher Jonas Benjamin Friedli
Description

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.

References

1 affected software package

Software Type Plugin
Software Slug fusewp (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 1.1.23.0
Patched Version
  • 1.1.23.1
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