Don't Call That "Protected" Method: Dissecting an N-Day vBulletin RCE
👤 by Egidio Romano
The article analyzes a critical Unauthenticated Remote Code Execution vulnerability (CVE-2025-48827) in vBulletin, which becomes exploitable when running on PHP 8.1 or newer.
The vulnerability stems from vBulletin’s misuse of ReflectionMethod::invoke(), which in PHP 8.1+ no longer blocks access to protected methods by default. As a result, attackers can remotely trigger sensitive internal functions originally meant to be inaccessible and achieve code execution on the server.
📝 Contents:
● The Vulnerability
● The vBulletin Vulnerability
● Exploiting vBulletin: Path to Pre-Auth RCE
● Conclusion
https://karmainsecurity.com/dont-call-that-protected-method-vbulletin-rce
👤 by Egidio Romano
The article analyzes a critical Unauthenticated Remote Code Execution vulnerability (CVE-2025-48827) in vBulletin, which becomes exploitable when running on PHP 8.1 or newer.
The vulnerability stems from vBulletin’s misuse of ReflectionMethod::invoke(), which in PHP 8.1+ no longer blocks access to protected methods by default. As a result, attackers can remotely trigger sensitive internal functions originally meant to be inaccessible and achieve code execution on the server.
📝 Contents:
● The Vulnerability
● The vBulletin Vulnerability
● Exploiting vBulletin: Path to Pre-Auth RCE
● Conclusion
https://karmainsecurity.com/dont-call-that-protected-method-vbulletin-rce