CVE-2026-73532 — Fluent Forms Pro 6.2.7 Embedded Malicious Code via Tampered Plugin Build
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…
Published: 2026-08-13 · CVSS: 9.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7