CVE-2019-25729: Simcy Creative PDF Signer

Critical severity, CVSS 9.8. EPSS: 0.3% chance of exploitation in the next 30 days.

PDF Signer 3.0 contains a server-side template injection vulnerability that allows unauthenticated attackers to execute arbitrary code by injecting PHP commands through the CSRF-TOKEN cookie parameter. Attackers can craft malicious cookie values containing template injection payloads like shell_exec() to execute system commands and retrieve sensitive information from the server.

Affected products

Published 2026-06-04. Last modified 2026-07-22.