CVE-2026-73532

CriticalCVSS 9.8/10Last modified Sep 9, 2026

Description

Fluent Forms Pro 6.2.7 contains an embedded malicious code vulnerability introduced via a tampered plugin build served through a decommissioned update server. The tampered build introduced a rogue PHP file (libs/class-license-sync.php), loaded via a require_once directive added to fluentformpro.php, that established a backdoor REST API endpoint, dropped persistent PHP files in mu-plugins and uploads directories, installed a passwordless administrator account, and registered scheduled tasks that survived plugin removal.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-506

Affected software

VendorProductVersions
WPManageNinjaFluent Forms Pro6.2.7

References

Timeline

Published
Aug 13, 2026
Last modified
Sep 9, 2026
NVD status
Deferred

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