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CVE-2022-41913— Discourse-calendar exposes members of hidden groups

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存在信息泄露漏洞，该漏洞源于其用户可以列出私有组或具有私有成员的公共组的成员，用户可以创建和编辑发布事件。

CVSS 4.3 · Medium EPSS 0.39% · P32

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2022-41913

Vulnerability Information
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Vulnerability Title
Discourse-calendar exposes members of hidden groups
Source: CVE Program / CVE List V5
Vulnerability Description
Discourse-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. Members of private groups or public groups with private members can be listed by users, who can create and edit post events. This vulnerability only affects sites which have discourse post events enabled. This issue has been patched in commit `ca5ae3e7e` which will be included in future releases. Users unable to upgrade should disable the `discourse_post_event_enabled` setting to fully mitigate the issue. Also, it's possible to prevent regular users from using this vulnerability by removing all groups from the `discourse_post_event_allowed_on_groups` but note that moderators will still be able to use it.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Discourse 信息泄露漏洞
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存在信息泄露漏洞，该漏洞源于其用户可以列出私有组或具有私有成员的公共组的成员，用户可以创建和编辑发布事件。
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 < 0.3 -

II. Public POCs for CVE-2022-41913

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III. Intelligence Information for CVE-2022-41913

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Patches & Fixes for CVE-2022-41913 (1)

IV. Related Vulnerabilities

Same product: discourse-calendar
Same vendor: discourse
Same weakness: CWE-200

V. Comments for CVE-2022-41913

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