YesWiki vulnerable to authenticated arbitrary file deletion

YesWiki is a wiki system written in PHP. In versions up to and including 4.4.5, it is possible for any authenticated user, through the use of the filemanager to delete any file owned by the user running the FastCGI Process Manager (FPM) on the host without any limitation on the filesystem's scope. This vulnerability allows any authenticated user to arbitrarily remove content from the Wiki resulting in partial loss of data and defacement/deterioration of the website. In the context of a container installation of YesWiki without any modification, the `yeswiki` files (for example .php) are not owned by the same user (root) as the one running the FPM process (www-data). However in a standard installation, www-data may also be the owner of the PHP files, allowing a malicious user to completely cut the access to the wiki by deleting all important PHP files (like index.php or core files of YesWiki). Version 4.5.0 contains a patch for this issue.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

对路径名的限制不恰当(路径遍历)

YesWiki 路径遍历漏洞

YesWiki是法国YesWiki组织的一个用 PHP 编写的 wiki 系统。用于以协作方式创建和管理网站。 YesWiki 4.4.5及之前版本存在路径遍历漏洞，该漏洞源于文件管理器允许认证用户删除FPM进程用户拥有的任意文件，不受限于文件系统范围。

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