Stored XSS by authenticated backend user with access to upload files

October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. In October CMS from version 1.0.319 and before version 1.0.469, backend users with access to upload files were permitted to upload SVG files without any sanitization applied to the uploaded files. Since SVG files support being parsed as HTML by browsers, this means that they could theoretically upload Javascript that would be executed on a path under the website's domain (i.e. /storage/app/media/evil.svg), but they would have to convince their target to visit that location directly in the target's browser as the backend does not display SVGs inline anywhere, SVGs are only displayed as image resources in the backend and are thus unable to be executed. Issue has been patched in Build 469 (v1.0.469) & v1.1.0.

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

在Web页面生成时对输入的转义处理不恰当(跨站脚本)

October CMS 跨站脚本漏洞

October CMS是一套基于PHP和Laravel Web应用程序框架的开源内容管理系统（CMS）。 October CMS 1.0.319版本和1.0.469版本存在安全漏洞，该漏洞允许具有上传文件权限的后端用户上传SVG文件，而无需对上传的文件进行任何处理。

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