Unauthorized Data Modification Vulnerability in FuseWP Plugin for WordPress
CVE-2025-11975

4.3MEDIUM

Key Information:

Vendor

WordPress
Status
FuseWP – WordPress User Sync To Email List & Marketing Automation (mailchimp, Constant Contact, Activecampaign Etc.)
Vendor
CVE Published:
31 October 2025

What is CVE-2025-11975?

The FuseWP plugin for WordPress is susceptible to unauthorized changes due to a lack of proper capability checks in the save_changes() function. This vulnerability allows attackers without authentication to manipulate sync rules, posing significant risks to user data integrity. Users should ensure they are using an updated version of the plugin to mitigate these risks. For detailed security advice, reference the official documentation and guidelines from the vendor.

Affected Version(s)

FuseWP – WordPress User Sync to Email List & Marketing Automation (Mailchimp, Constant Contact, ActiveCampaign etc.) * <= 1.1.23.0

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/changeset/3383939/fuse...

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jonas Benjamin Friedli
JSON
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CVE-2025-11975 : Unauthorized Data Modification Vulnerability in FuseWP Plugin for WordPress