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CVE-2022-31059— Discourse Calendar Event names susceptible to Cross-site Scripting

Quick assessment

Affected
discourse discourse-calendar
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 Calendar 1.0.1之前版本存在跨站脚本漏洞，攻击者利用该漏洞可以影响事件名称的解析和呈现。

CVSS 6.5 · Medium EPSS 0.72% · P51
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I. Basic Information for CVE-2022-31059

Vulnerability Information
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Vulnerability Title
Discourse Calendar Event names susceptible to Cross-site Scripting
Source: CVE Program / CVE List V5
Vulnerability Description
Discourse Calendar is a calendar plugin for Discourse, an open-source messaging app. Prior to version 1.0.1, parsing and rendering of Event names can be susceptible to cross-site scripting (XSS) attacks. This vulnerability only affects sites which have modified or disabled Discourse’s default Content Security Policy. This issue is patched in version 1.0.1 of the Discourse Calendar plugin. As a workaround, 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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
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 Calendar 1.0.1之前版本存在跨站脚本漏洞，攻击者利用该漏洞可以影响事件名称的解析和呈现。
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

Vendor Product Affected Versions CPE Subscribe
discourse discourse-calendar < 1.0.1 -

II. Public POCs for CVE-2022-31059

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III. Intelligence Information for CVE-2022-31059

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Patches & Fixes for CVE-2022-31059 (2)

Vendor Advisories for CVE-2022-31059 (1)

IV. Related Vulnerabilities

Same product: discourse-calendar
Same vendor: discourse
Same weakness: CWE-79

V. Comments for CVE-2022-31059

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