WP Fusion Lite: Unauthenticated CRM settings overwrite redirects user data
The WP Fusion Lite WordPress plugin before 3.48.0 does not require authentication on a settings handler that runs during admin initialization, allowing unauthenticated users to overwrite the site's CRM integration endpoint and credentials, after which synced user data is delivered to an attacker-chosen host. The authoritative export identifies the fixed release as 3.48.0.
- Component
- WP Fusion Lite
- Plugin slug
wp-fusion-lite- Affected
- 3.37.14 to < 3.48.0
- Safe version
3.48.0- Published
- Oct 01, 2026
- Weakness
- Not assigned
This CVE was published Oct 01, 2026 and is one of 6 known issues for this plugin.
Update, patch or deactivate.
Update WP Fusion Lite to 3.48.0 or a later supported release. Require administrative authorization and request verification before changing CRM endpoints or credentials; review destinations and rotate exposed credentials.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
The WP Fusion Lite WordPress plugin before 3.48.0 does not require authentication on a settings handler that runs during admin initialization, allowing unauthenticated users to overwrite the site's CRM integration endpoint and credentials, after which synced user data is delivered to an attacker-chosen host.