Lucien

A critical issue was found in YouDianCMS, affecting the file AppLibActionAdminChannelAction.class.php. The manipulation of the `file` argument leads to unrestricted upload. This issue can be exploited remotely. The exploit has been disclosed publicly.

The issue allows local users to gain privileges or cause a denial of service (use-after-free) by leveraging improper access to a certain error field in the ext4 journal stop function.