CVE-2023-43658— Improper escaping of user input in discourse-calendar
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I. Basic Information for CVE-2023-43658
Vulnerability Information
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Vulnerability Title
Improper escaping of user input in discourse-calendar
Source: NVD (National Vulnerability Database)
Vulnerability Description
dicourse-calendar is a plugin for the Discourse messaging platform which adds the ability to create a dynamic calendar in the first post of a topic. Improper escaping of event titles could lead to Cross-site Scripting (XSS) within the 'email preview' UI when a site has CSP disabled. Having CSP disabled is a non-default configuration, so the vast majority of sites are unaffected. This problem is resolved in the latest version of the discourse-calendar plugin. Users are advised to upgrade. Users unable to upgrade should ensure CSP is enabled on the forum.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
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。 dicourse-calendar存在跨站脚本漏洞，该漏洞源于事件标题的不当转义，可能会导致跨站脚本(XSS)。
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 | < 97883109 | - |
II. Public POCs for CVE-2023-43658
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|---|
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- Content Security Policy (CSP) - HTTP | MDNx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2023-43658
Same Patch Batch · discourse · 2023-10-16 · 7 CVEs total
| CVE-2023-43659 | 8.0 HIGH | Cross-site Scripting via email preview when CSP disabled in Discourse |
| CVE-2023-45131 | 7.5 HIGH | Unauthenticated access to new private chat messages in Discourse |
| CVE-2023-44388 | 7.5 HIGH | Malicious requests can fill up the log files resulting in a deinal of service in Discourse |
| CVE-2023-44391 | 5.3 MEDIUM | Prevent unauthorized access to summary details in Discourse |
| CVE-2023-45147 | 4.9 MEDIUM | Arbitrary keys can be added to a topic's custom fields by any user in Discourse |
| CVE-2023-43814 | 3.7 LOW | Exposure of poll options and votes to unauthorized users in Discourse |
IV. Related Vulnerabilities
Same product: discourse-calendar
- CVE-2024-45303
Discourse Calendar plugin event names susceptible to XSS - CVE-2024-21658
Insufficient control of region value length in discourse-cal - CVE-2024-24817
User can see invitees in events created in PMs and private c - CVE-2024-26145
Uninvited user is able to join and mark the attendance of th - CVE-2022-41913
Discourse-calendar exposes members of hidden groups
Same vendor: discourse
- CVE-2026-34947
Discourse: Staged user custom fields are exposed on public i - CVE-2026-27481
Discourse: Hidden tag visibility bypass on tag routes - CVE-2026-33415
Discourse: Improper Access Control in discourse-ai Allows Un - CVE-2026-33300
Discourse: Hidden group names and access metadata are expose - CVE-2026-33185
Discourse: Group SMTP test endpoint susceptible to SSRF
Same weakness: CWE-79
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Devs Palace ERP Online purchase_save cross site scripting
V. Comments for CVE-2023-43658
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