由于我无法直接访问互联网链接或先知社区的具体内容，我将基于常见的"wangmarket代码审计"相关知识和典型漏洞模式，为您整理一份详尽的代码审计教学文档。以下内容综合了常见的CMS审计经验：<\/p>

Wangmarket代码审计深度教学<\/h1>

一、环境准备与基础分析<\/h2>

源码结构分析<\/strong><\/p>

典型目录结构：
\/admin\/ 后台管理模块 \/api\/ API接口目录 \/include\/ 核心函数库 \/template\/ 模板文件 \/upload\/ 上传目录 \/install\/ 安装程序 <\/code><\/pre> <\/li> <\/ul> <\/li> 审计工具准备<\/strong><\/p> 静态分析：RIPS、Fortify、Seay源代码审计系统<\/li> 动态调试：Xdebug + PHPStorm<\/li> 辅助工具：Burp Suite、SQLMap<\/li> <\/ul> <\/li> <\/ol> 二、高危漏洞审计要点<\/h2> 1. SQL注入漏洞<\/h3> 审计关键点<\/strong>：<\/p> 查找未过滤的输入点： $_GET\/<\/span>$_POST\/<\/span>$_REQUEST 直接拼接SQL语句<\/span> <\/span><\/span>$db-><\/span>query<\/span>("SELECT * FROM table WHERE id="<\/span>.<\/span>$_GET['id'<\/span>]); <\/span><\/span><\/code><\/pre><\/li> 重点关注函数： mysqli_query\/mysql_query<\/li> $db->query()<\/li> 动态表名拼接处<\/li> <\/ul> <\/li> <\/ul> 修复方案<\/strong>：<\/p> \/\/ 使用预处理 <\/span><\/span><\/span><\/span>$stmt =<\/span> $db-><\/span>prepare<\/span>("SELECT * FROM users WHERE id = ?"<\/span>); <\/span><\/span>$stmt-><\/span>bind_param<\/span>("i"<\/span>, $_GET['id'<\/span>]); <\/span><\/span><\/code><\/pre>2. 文件上传漏洞<\/h3> 审计路径<\/strong>：<\/p> 检查上传文件类型白名单<\/li> 验证文件头检测逻辑<\/li> 检查文件名随机化处理<\/li> 验证.htaccess是否可上传<\/li> <\/ol> 典型漏洞代码<\/strong>：<\/p> \/\/ 危险示例：仅检查Content-Type <\/span><\/span><\/span><\/span>if<\/span>($_FILES['file'<\/span>]['type'<\/span>] ==<\/span> 'image\/jpeg'<\/span>){ <\/span><\/span> move_uploaded_file<\/span>($_FILES['file'<\/span>]['tmp_name'<\/span>], 'upload\/'<\/span>.<\/span>$_FILES['file'<\/span>]['name'<\/span>]); <\/span><\/span>} <\/span><\/span><\/code><\/pre>3. XSS漏洞<\/h3> 审计重点<\/strong>：<\/p> 输出未过滤的变量： echo<\/span> $_GET['search'<\/span>]; <\/span><\/span><\/code><\/pre><\/li> 富文本编辑器XSS：检查HTML标签过滤规则<\/li> 验证on*事件处理<\/li> 检查SVG文件上传<\/li> <\/ul> <\/li> <\/ul> 修复方案<\/strong>：<\/p> htmlspecialchars<\/span>($input, ENT_QUOTES<\/span>, 'UTF-8'<\/span>); <\/span><\/span><\/code><\/pre>4. 权限绕过漏洞<\/h3> 审计方法<\/strong>：<\/p> 检查权限验证中间件： if<\/span>(!<\/span>isset<\/span>($_SESSION['admin'<\/span>])){ <\/span><\/span> die<\/span>('Access Denied'<\/span>); <\/span><\/span>} <\/span><\/span><\/code><\/pre><\/li> 寻找平行权限漏洞<\/li> 检查越权操作（如修改其他用户数据）<\/li> <\/ol> 三、核心模块审计技巧<\/h2> 1. 后台管理系统审计<\/h3> 检查二次验证机制<\/li> 验证管理日志记录完整性<\/li> 测试CSRF防护Token<\/li> <\/ul> 2. 数据库操作审计<\/h3> 跟踪数据库连接配置<\/li> 检查预编译语句使用情况<\/li> 验证错误信息泄露<\/li> <\/ul> 3. 文件包含漏洞<\/h3> 审计模式<\/strong>：<\/p> include<\/span>($_GET['page'<\/span>].<\/span>'.php'<\/span>); <\/span><\/span><\/code><\/pre>防护方案<\/strong>：<\/p> $allow =<\/span> ['home'<\/span>,'about'<\/span>]; <\/span><\/span>if<\/span>(in_array<\/span>($_GET['page'<\/span>], $allow)){ <\/span><\/span> include<\/span>($_GET['page'<\/span>].<\/span>'.php'<\/span>); <\/span><\/span>} <\/span><\/span><\/code><\/pre>四、历史漏洞模式参考<\/h2> 典型注入案例<\/strong>：<\/p> \/\/ 旧版本中发现的注入点 <\/span><\/span><\/span><\/span>$id =<\/span> $_GET['id'<\/span>]; \/\/ 未过滤 <\/span><\/span><\/span><\/span>$sql =<\/span> "DELETE FROM news WHERE id=<\/span>$id<\/span>"<\/span>; <\/span><\/span><\/code><\/pre><\/li> 安全配置缺陷<\/strong>：<\/p> install.php未删除<\/li> 默认管理员凭证<\/li> 调试模式开启<\/li> <\/ul> <\/li> <\/ol> 五、自动化审计方法<\/h2> 使用正则匹配高危函数： (system|exec|shell_exec|eval)\( <\/code><\/pre> <\/li> 跟踪变量传递流程<\/li> 敏感函数回溯分析<\/li> <\/ol> 六、修复建议<\/h2> 输入输出过滤原则：所有输入视为不可信<\/li> 输出进行HTML编码<\/li> <\/ul> <\/li> 最小权限原则<\/li> 安全头设置（CSP、X-Frame-Options）<\/li> <\/ol> 七、实战审计流程<\/h2> 安装并运行系统<\/li> 使用Burp抓取所有请求<\/li> 重点审计：用户认证流程<\/li> 数据修改操作<\/li> 文件处理功能<\/li> <\/ul> <\/li> 编写POC验证漏洞<\/li> <\/ol> 请根据实际审计的Wangmarket版本代码，重点检查以上模块和模式，特别注意自定义过滤函数的实现是否严谨。建议结合动态测试与静态分析进行完整审计。<\/p> 注：如需针对特定版本进行更精确的审计分析，请提供更多代码细节或漏洞描述。<\/p>