PhpSpreadsheet is a widely used library written in pure PHP. It offers a robust set of classes to The post PhpSpreadsheet RCE Vulnerability: PoC Exploit Disclosed for 312 Million Users appeared first on Daily CyberSecurity. Related posts: CISA Flags Active Exploits in Erlang/OTP SSH and Roundcube Webmail: Critical RCE and XSS Flaws Under Attack FortiWeb SQL Injection (CVE-2025-25257) Added to CISA KEV After Active Exploitation, PoC Available! Critical Livewire RCE (CVE-2025-54068) Threatens Millions of Laravel Apps – Patch Immediately!