Vulnerability Information
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Vulnerability Title
HedgeDoc allows XSS possibility through malicious SVG uploads
Vulnerability Description
HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to 1.10.3, a malicious SVG file uploaded to HedgeDoc results in the possibility of XSS when opened in a new tab instead of the editor itself. The XSS is possible by exploiting the JSONP capabilities of GitHub Gist embeddings. Only instances with the local filesystem upload backend or special configurations, where the uploads are served from the same domain as HedgeDoc, are vulnerable. This vulnerability is fixed in 1.10.3. When upgrading to HedgeDoc 1.10.3 is not possible, instance owners could add the following headers for all routes under /uploads as a first-countermeasure: Content-Disposition: attachment and Content-Security-Policy: default-src 'none'. Additionally, the external URLs in the script-src attribute of the Content-Security-Policy header should be removed.
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Vulnerability Title
HedgeDoc 跨站脚本漏洞
Vulnerability Description
HedgeDoc是HedgeDoc团队的一个基于Javascript的Markdown文档实时编辑分享平台。 HedgeDoc 1.10.3之前版本存在跨站脚本漏洞，该漏洞源于恶意SVG文件可能导致跨站脚本攻击。
CVSS Information
N/A
Vulnerability Type
N/A