Known vulnerabilities in FuseWP – WordPress User Sync to Email List & Marketing Automation (Mailchimp, Constant Contact, ActiveCampaign etc.)

Subscribe WordPress users to CRM & email marketing software. Constant Contact, Mailchimp ActiveCampaign MailerLite Brevo Klaviyo AWeber HubSpot etc

3Reported vulnerabilities

4.3Highest CVSS score

1.1.26.1Latest version

2,000+Active installs

What to do now

Update FuseWP – WordPress User Sync to Email List & Marketing Automation (Mailchimp, Constant Contact, ActiveCampaign etc.) to 1.1.25.2 or later. 3 of these have a fixed version available. Updating resolves them.

Plugin last updated: August 11, 2026 / Tested up to WordPress: 7.0.4 / View on wordpress.org

Reported vulnerabilities

Ordered by how urgently they need attention — whether a vulnerability is actually being exploited, and how likely exploitation is, rather than CVSS severity alone.

CVE	Severity	Exploit probability next 30 days	Affected versions	Fixed in	Published
CVE-2026-5582	Medium 4.3	0.1%	0 to 1.1.24.2 (inclusive)	`1.1.25.2`	July 30, 2026
CVE-2025-11975	Medium 4.3	0.2%	0 to 1.1.23.0 (inclusive)	`1.1.23.1`	October 31, 2025
CVE-2025-11976	Medium 4.3	0.1%	0 to 1.1.23.0 (inclusive)	`1.1.23.1`	October 25, 2025

Sources: vulnerability records from NVD, exploitation from CISA KEV, exploit probability from EPSS. Affected versions come from CPE ranges or from the reporting CNA.