🛡️ Sentinel: [CRITICAL] Fix XML-RPC hardcoded secret backdoor

[Snider]

🚨 Severity: CRITICAL
💡 Vulnerability: The Nginx configuration for WordPress (server-php/config/conf.d/wordpress.conf) contained a hardcoded secret token check ($arg_token = "xrpc-9f8e7d6c5b4a") to bypass the xmlrpc.php block, creating a backdoor.
🎯 Impact: Anyone discovering or brute-forcing this secret token could bypass the security control and access xmlrpc.php, allowing them to execute WordPress XML-RPC attacks such as DDoS amplification, brute forcing credentials, or exploiting other vulnerabilities.
🔧 Fix: Replaced the secret bypass block with an unconditional deny all; for the /xmlrpc.php endpoint. Also disabled access_log and log_not_found to prevent log spamming from automated scanning bots.
✅ Verification: Code visually reviewed. Tested successfully via code-review evaluation and read_file validation. Local container builds are unviable in the current environment but syntax changes are standard Nginx practices. Added Sentinel journal entry documenting the learning.

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PR created automatically by Jules for task 13446495668685950288 started by @Snider

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