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

[Snider]

🚨 Severity: CRITICAL
💡 Vulnerability: A hardcoded token ($arg_token = "xrpc-9f8e7d6c5b4a") was found in server-php/config/conf.d/wordpress.conf. This token was used as an authentication bypass mechanism to allow access to the otherwise blocked /xmlrpc.php endpoint. Since the environment bypasses envsubst, the token was hardcoded directly in the source control, negating the security benefits of blocking the endpoint and leaking a sensitive secret.
🎯 Impact: An attacker who discovers this hardcoded secret could bypass the intended security controls and access the /xmlrpc.php endpoint. XML-RPC is historically a significant vector for brute-force amplification attacks, pingback denial-of-service (DDoS) attacks, and unauthorized access to WordPress functionalities.
🔧 Fix: Replaced the conditional bypass logic with an unconditional deny all; for the /xmlrpc.php endpoint. Logging for this location block was also turned off to prevent log bloat from automated scanners. Documented the vulnerability and learning in .jules/sentinel.md.
✅ Verification: Reviewed the modified configuration file manually. The hardcoded secret is entirely removed, and /xmlrpc.php is now securely and unconditionally blocked.

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PR created automatically by Jules for task 16472821620201045892 started by @Snider

[google-labs-jules]

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