HtmlSanitizer 安全漏洞

CVE编号

CVE-2020-26293

利用情况

暂无

补丁情况

N/A

披露时间

2021-01-05

漏洞描述

HtmlSanitizer is a .NET library for cleaning HTML fragments and documents from constructs that can lead to XSS attacks. In HtmlSanitizer before version 5.0.372, there is a possible XSS bypass if style tag is allowed. If you have explicitly allowed the `<style>` tag, an attacker could craft HTML that includes script after passing through the sanitizer. The default settings disallow the `<style>` tag so there is no risk if you have not explicitly allowed the `<style>` tag. The problem has been fixed in version 5.0.372.

解决建议

建议您更新当前系统或软件至最新版，完成漏洞的修复。

参考链接
https://github.com/mganss/HtmlSanitizer/commit/a3a7602a44d4155d51ec0fbbedc2a4...
https://github.com/mganss/HtmlSanitizer/releases/tag/v5.0.372
https://github.com/mganss/HtmlSanitizer/security/advisories/GHSA-8j9v-h2vp-2hhv
https://www.nuget.org/packages/HtmlSanitizer/

受影响软件情况

#	类型	厂商	产品	版本	影响面
1
	运行在以下环境
	应用	htmlsanitizer_project	htmlsanitizer	*		Up to (excluding) 5.0.372

CVSS3评分 6.1

• 攻击路径 网络
• 攻击复杂度 低
• 权限要求 无
• 影响范围 已更改
• 用户交互 需要
• 可用性 无
• 保密性 低
• 完整性 低

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CWE-ID 漏洞类型 CWE-79 在Web页面生成时对输入的转义处理不恰当（跨站脚本）