Ultra Addons for Contact Form 7 up to 3.5.50 lets unauthenticated visitors upload arbitrary files via a signature field. Update to 3.5.51 or later.
Affected component: Ultra Addons for Contact Form 7 (plugin)
Fixed in: 3.5.51
PowerSEC coverage: PowerSEC detects the affected versions on every plan, and has since September 28, 2026. No PowerSEC firewall rule blocks this attack. Update to 3.5.51 or later to remove the vulnerability.
Full advisory, including detection steps and remediation: https://powersec.io/vulnerability/cve-2026-82901