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CVE-2021-37693— Re-use of email tokens 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 2.7.8之前版本和2.8.0.beta4之前版本存在安全漏洞。该漏洞源于当向Discussion站点上的现有帐户添加其他电子邮件地址时，将生成电子邮件令牌，作为电子邮件验证过程的一部分。删除额外的电子邮件地址不会使未使用的令牌失效，该令牌可用于其他上下文，包括重置密码

CVSS 5.3 · Medium EPSS 0.83% · P56
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I. Basic Information for CVE-2021-37693

Vulnerability Information
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Vulnerability Title
Re-use of email tokens in Discourse
Source: CVE Program / CVE List V5
Vulnerability Description
Discourse is an open-source platform for community discussion. In Discourse before versions 2.7.8 and 2.8.0.beta4, when adding additional email addresses to an existing account on a Discourse site an email token is generated as part of the email verification process. Deleting the additional email address does not invalidate an unused token which can then be used in other contexts, including reseting a password.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
忘记口令恢复机制弱
Source: CVE Program / CVE List V5
Vulnerability Title
Discourse 代码问题漏洞
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 2.7.8之前版本和2.8.0.beta4之前版本存在安全漏洞。该漏洞源于当向Discussion站点上的现有帐户添加其他电子邮件地址时，将生成电子邮件令牌，作为电子邮件验证过程的一部分。删除额外的电子邮件地址不会使未使用的令牌失效，该令牌可用于其他上下文，包括重置密码
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 < 2.7.8 -

II. Public POCs for CVE-2021-37693

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III. Intelligence Information for CVE-2021-37693

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Patches & Fixes for CVE-2021-37693 (1)

Vendor Advisories for CVE-2021-37693 (1)

IV. Related Vulnerabilities

Same product: discourse
Same vendor: discourse
Same weakness: CWE-640

V. Comments for CVE-2021-37693

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