fix: harden WordPress against WPScan findings

docker-compose.yml

@@ -52,6 +52,7 @@ services:
             $$_SERVER['HTTPS'] = 'on';
         }
         define('DISALLOW_FILE_EDIT', true);
+        define('DISABLE_WP_CRON', true);
         define('WP_AUTO_UPDATE_CORE', 'minor');
         define('WP_POST_REVISIONS', 10);
         if (getenv('WP_ENVIRONMENT_TYPE') === 'production') {

docs/adr/0001-wordpress-single-page.md

@@ -12,7 +12,7 @@ architecture and starts independently from `main`.
 
 ## Decision
 
-Use pinned WordPress 7.0/PHP 8.3 with MariaDB 11.8 LTS. Build a dependency-free custom
+Use pinned WordPress 7.0.2/PHP 8.3 with MariaDB 11.8 LTS. Build a dependency-free custom
 classic theme for exact semantic markup and responsive design. Store homepage fields as
 sanitized theme modifications, while a must-use plugin owns Shows and Gallery custom
 post types so structured content is not lost when changing themes.

docs/architecture.md

@@ -1,7 +1,7 @@
 # Architecture
 
 NGINX is the only public entry point for `azionelab.org`. It proxies HTTP to the
-official WordPress 7.0/PHP 8.3 Apache image over the private `web` network. WordPress
+official WordPress 7.0.2/PHP 8.3 Apache image over the private `web` network. WordPress
 connects to MariaDB 11.8 LTS over a separate internal `data` network. Neither WordPress
 nor MariaDB publishes a host port; automated security checks guard this assumption.
 

docs/operations.md

@@ -23,6 +23,11 @@ Review security releases routinely, update pins in a task branch, rebuild, run t
 test suite, and deploy. Production disables WordPress web-based file modifications, so
 image rebuilds are the update path.
 
+External `wp-cron.php` requests are blocked to reduce public attack surface. If future
+content scheduling, maintenance jobs, or plugin features require WordPress cron, run it
+from a controlled host/container cron against the private WordPress service instead of
+leaving the public trigger enabled.
+
 ## Backup and restore
 
 Create database and WordPress file backups in one maintenance window. The default host
@@ -42,6 +47,8 @@ the database and file volume together, restart, and verify the homepage, media,
   owner or mode; run `./scripts/prepare-host-volumes.sh` after changing paths or image
   user IDs.
 - SMTP is not configured; WordPress password-reset email needs an external mail service.
+- WordPress cron is not publicly triggerable; scheduled jobs need an operator-managed
+  cron runner if that feature becomes necessary.
 - Admin MFA and network allowlisting are deployment concerns and are not bundled.
 - WordPress plugins expand the attack surface; install only reviewed, maintained,
   necessary plugins.

docs/security.md

@@ -12,9 +12,11 @@
 - File editing is always disabled. Production also disables web-based core, theme, and
   plugin changes; patched images are rebuilt and redeployed instead.
 - XML-RPC and comments are disabled. NGINX blocks PHP execution below uploads, dotfiles,
-  and direct `wp-config.php` requests, and rate-limits login/public requests. Apache
-  also denies uploaded PHP files and direct access to sensitive WordPress internals as
-  defense in depth. Public REST user enumeration and author archives are disabled.
+  direct `wp-config.php` requests, the WordPress readme/license files, direct
+  installation entry points, public mu-plugin directory probing, and external
+  `wp-cron.php` requests. It also rate-limits login/public requests. Apache also denies
+  uploaded PHP files and direct access to sensitive WordPress internals as defense in
+  depth. Public REST user enumeration and author archives are disabled.
 - Security headers include CSP, same-origin framing, content-type protection, a strict
   referrer policy, and a restrictive Permissions Policy. WordPress compatibility still
   requires inline style/script CSP allowances; do not treat this CSP as an XSS sanitizer.

nginx/proxy-routes.conf

@@ -18,6 +18,26 @@ location = /xmlrpc.php {
     return 403;
 }
 
+location = /wp-cron.php {
+    return 403;
+}
+
+location = /readme.html {
+    return 404;
+}
+
+location = /license.txt {
+    return 404;
+}
+
+location = /wp-admin/install.php {
+    return 404;
+}
+
+location ^~ /wp-content/mu-plugins/ {
+    return 404;
+}
+
 location = /wp-login.php {
     limit_req zone=login burst=5 nodelay;
     proxy_pass http://wordpress_backend;

tests/functional/tests/portal.spec.ts

@@ -121,6 +121,11 @@ test("protects the edge and exposes the WordPress admin", async ({ page, request
   expect((await request.get("/xmlrpc.php")).status()).toBe(403);
   expect((await request.get("/.env")).status()).toBe(404);
   expect((await request.get("/wp-config.php")).status()).toBe(404);
+  expect((await request.get("/readme.html")).status()).toBe(404);
+  expect((await request.get("/license.txt")).status()).toBe(404);
+  expect((await request.get("/wp-admin/install.php")).status()).toBe(404);
+  expect((await request.get("/wp-content/mu-plugins/")).status()).toBe(404);
+  expect((await request.get("/wp-cron.php")).status()).toBe(403);
   expect((await request.get("/wp-content/uploads/probe.php")).status()).toBe(403);
   expect((await request.get("/wp-json/wp/v2/users")).status()).toBe(404);
   expect((await request.get("/?post_type=azl_show&name=le-cose-che-restano")).status()).toBe(404);

tests/security/check-compose.sh

@@ -22,12 +22,37 @@ grep -q 'azionelab-apache-hardening.conf' /workspace/wordpress/Dockerfile || {
     exit 1
 }
 
+grep -q '^FROM wordpress:7\.0\.2-php8\.3-apache$' /workspace/wordpress/Dockerfile || {
+    echo "The WordPress image must use the patched 7.0.2 PHP 8.3 Apache tag." >&2
+    exit 1
+}
+
 grep -q 'wp-content/(uploads|files)' /workspace/wordpress/apache-hardening.conf || {
     echo "Apache hardening must block PHP execution below uploads/files." >&2
     exit 1
 }
 
+grep -q 'wp-content/mu-plugins' /workspace/wordpress/apache-hardening.conf || {
+    echo "Apache hardening must block direct mu-plugin probing." >&2
+    exit 1
+}
+
 grep -q "'publicly_queryable'[[:space:]]*=>[[:space:]]*false" /workspace/wordpress/mu-plugins/azionelab-content.php || {
     echo "Structured show content must not be exposed as standalone public routes." >&2
     exit 1
 }
+
+grep -q "location = /wp-cron.php" /workspace/nginx/proxy-routes.conf || {
+    echo "NGINX must block external wp-cron.php requests." >&2
+    exit 1
+}
+
+grep -q "location = /readme.html" /workspace/nginx/proxy-routes.conf || {
+    echo "NGINX must hide the WordPress readme.html file." >&2
+    exit 1
+}
+
+grep -q "location ^~ /wp-content/mu-plugins/" /workspace/nginx/proxy-routes.conf || {
+    echo "NGINX must hide the mu-plugins directory from public probing." >&2
+    exit 1
+}

wordpress/Dockerfile

@@ -1,4 +1,4 @@
-FROM wordpress:7.0.0-php8.3-apache
+FROM wordpress:7.0.2-php8.3-apache
 
 COPY php.ini /usr/local/etc/php/conf.d/azionelab.ini
 COPY .htaccess /opt/azionelab/.htaccess

wordpress/apache-hardening.conf

@@ -10,6 +10,14 @@ TraceEnable Off
     Require all denied
 </LocationMatch>
 
+<LocationMatch "^/(readme\.html|license\.txt|wp-admin/install\.php|wp-cron\.php)$">
+    Require all denied
+</LocationMatch>
+
+<LocationMatch "^/wp-content/mu-plugins/">
+    Require all denied
+</LocationMatch>
+
 <LocationMatch "^/wp-admin/includes/">
     Require all denied
 </LocationMatch>