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CVE-2023-23622— Discourse: Presence of read restricted topics may be leaked if tagged with a tag that is visible to all users

Quick assessment

Affected
discourse discourse
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存在信息泄露漏洞，该漏洞源于标签显示的主题数默认只计算未读的常规主题限制类别。

CVSS 4.3 · Medium EPSS 0.53% · P43
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I. Basic Information for CVE-2023-23622

Vulnerability Information
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Vulnerability Title
Discourse: Presence of read restricted topics may be leaked if tagged with a tag that is visible to all users
Source: CVE Program / CVE List V5
Vulnerability Description
Discourse is an open-source discussion platform. Prior to version 3.0.1 of the `stable` branch and version 3.1.0.beta2 of the `beta` and `tests-passed` branches, the count of topics displayed for a tag is a count of all regular topics regardless of whether the topic is in a read restricted category or not. As a result, any users can technically poll a sensitive tag to determine if a new topic is created in a category which the user does not have excess to. In version 3.0.1 of the `stable` branch and version 3.1.0.beta2 of the `beta` and `tests-passed` branches, the count of topics displayed for a tag defaults to only counting regular topics which are not in read restricted categories. Staff users will continue to see a count of all topics regardless of the topic's category read restrictions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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存在信息泄露漏洞，该漏洞源于标签显示的主题数默认只计算未读的常规主题限制类别。
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 stable < 3.0.1 -

II. Public POCs for CVE-2023-23622

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III. Intelligence Information for CVE-2023-23622

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Patches & Fixes for CVE-2023-23622 (4)

Vendor Advisories for CVE-2023-23622 (1)

Same Patch Batch · discourse · 2023-03-17 · 6 CVEs total

CVE-2023-26040 6.5 MEDIUM Discourse chat messages susceptible to Cross-site Scripting through chat excerpts
CVE-2023-28112 5.9 MEDIUM Discourse's SSRF protection missing for some FastImage requests
CVE-2023-28111 5.7 MEDIUM Discourse vulnerable to SSRF protection bypass possible with IPv4-mapped IPv6 addresses
CVE-2023-28107 4.5 MEDIUM Discourse vulnerable to multisite DoS by spamming backups
CVE-2023-25172 4.4 MEDIUM Discourse vulnerable to Cross-site Scripting - user name displayed on post

IV. Related Vulnerabilities

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

V. Comments for CVE-2023-23622

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