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CVE-2022-41921— Discourse chat messages should have a maximum character limit

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 2.9.0.beta13之前版本存在输入验证错误漏洞，该漏洞源于用户可以发布无限长度的聊天消息，这可能会导致其他用户在发布大量文本时拒绝服务。

CVSS 3.5 · Low EPSS 0.53% · P43

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2022-41921

Vulnerability Information
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Vulnerability Title
Discourse chat messages should have a maximum character limit
Source: CVE Program / CVE List V5
Vulnerability Description
Discourse is an open-source discussion platform. Prior to version 2.9.0.beta13, users can post chat messages of an unlimited length, which can cause a denial of service for other users when posting huge amounts of text. Users should upgrade to version 2.9.0.beta13, where a limit has been introduced. No known workarounds are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Discourse 输入验证错误漏洞
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 2.9.0.beta13之前版本存在输入验证错误漏洞，该漏洞源于用户可以发布无限长度的聊天消息，这可能会导致其他用户在发布大量文本时拒绝服务。
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 < 2.9.0.beta13 -

II. Public POCs for CVE-2022-41921

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III. Intelligence Information for CVE-2022-41921

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Patches & Fixes for CVE-2022-41921 (1)

Vendor Advisories for CVE-2022-41921 (1)

IV. Related Vulnerabilities

Same product: discourse
Same vendor: discourse
Same weakness: CWE-20

V. Comments for CVE-2022-41921

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