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CVE-2021-43793— Bypass of Poll voting limits in Discourse

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 存在安全漏洞，该漏洞源于Polls功能中对于用户单选项投票缺少过滤，允许用户在单选项投票中进行多次投票。

CVSS 4.3 · Medium EPSS 0.76% · P53

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-43793

Vulnerability Information
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Vulnerability Title
Bypass of Poll voting limits in Discourse
Source: CVE Program / CVE List V5
Vulnerability Description
Discourse is an open source discussion platform. In affected versions a vulnerability in the Polls feature allowed users to vote multiple times in a single-option poll. The problem is patched in the latest tests-passed, beta and stable versions of Discourse
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Discourse 安全漏洞
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 存在安全漏洞，该漏洞源于Polls功能中对于用户单选项投票缺少过滤，允许用户在单选项投票中进行多次投票。
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 < 2.7.11 -

II. Public POCs for CVE-2021-43793

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III. Intelligence Information for CVE-2021-43793

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Patches & Fixes for CVE-2021-43793 (2)

Vendor Advisories for CVE-2021-43793 (1)

Same Patch Batch · discourse · 2021-12-01 · 3 CVEs total

CVE-2021-43794 5.3 MEDIUM Anonymous user cache poisoning via development-mode header in Discourse
CVE-2021-43792 4.3 MEDIUM Notifications leak in Discourse

IV. Related Vulnerabilities

Same product: discourse
Same vendor: discourse
Same weakness: CWE-269

V. Comments for CVE-2021-43793

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