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I. Basic Information for CVE-2021-39161
Vulnerability Information

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Vulnerability Title
Cross-site scripting via category name in Discourse
Source: NVD (National Vulnerability Database)
Vulnerability Description
Discourse is an open source platform for community discussion. In affected versions category names can be used for Cross-site scripting(XSS) attacks. This is mitigated by Discourse's default Content Security Policy and this vulnerability only affects sites which have modified or disabled or changed Discourse's default Content Security Policy have allowed for moderators to modify categories. This issue is patched in the latest stable, beta and tests-passed versions of Discourse. Users are advised to ensure that the Content Security Policy is enabled, and has not been modified in a way which would make it more vulnerable to XSS attacks.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Discourse 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Discourse是一套开源的社区讨论平台。该平台包括社区、电子邮件和聊天室等功能。 Discourse 存在跨站脚本漏洞,该漏洞源于应用默认内容安全策略可以缓解这种情况,并且此漏洞仅影响已修改或禁用或更 Discourse的默认内容安全策略允许版主修改类别的站点。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
discoursediscourse < 2.7.8 -
II. Public POCs for CVE-2021-39161
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III. Intelligence Information for CVE-2021-39161
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IV. Related Vulnerabilities
V. Comments for CVE-2021-39161

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