macro-pdfviewer's preview in WYSIWYG editor allows accessing any PDF document as the last author

macro-pdfviewer is a PDF Viewer Macro for XWiki using Mozilla pdf.js. The PDF Viewer macro allows an attacker to view any attachment using the "Delegate my view right" feature as long as the attacker can view a page whose last author has access to the attachment. For this, the attacker only needs to provide the reference to a PDF file to the macro. To obtain the reference of the desired attachment, the attacker can access the Page Index, Attachments tab. Even if the UI shows N/A, the user can inspect the page and check the HTTP request that fetches the live data entries. The attachment URL is available in the returned JSON for all attachments, including protected ones and allows getting the necessary values. This vulnerability is fixed in version 2.5.6.

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

通过注释导致的信息暴露

PDF Viewer Macro 安全漏洞

PDF Viewer Macro是XWiki SAS开源的一个宏。允许在 XWiki 页面内查看附加到 XWiki 页面的 PDF 文件。 PDF Viewer Macro 2.5.6版本之前存在安全漏洞，该漏洞源于PDF查看器宏允许攻击者使用Delegate my view right功能查看任何附件，只要攻击者可以查看其最后一位作者有权访问附件的页面。

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