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CVE-2025-53102— Discourse's WebAuthn challenge isn't cleared from user session after authentication

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Discourse开源的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 3.4.7之前版本和3.5.0.beta.8之前版本存在授权问题漏洞，该漏洞源于WebAuthn挑战未清除，可能导致安全风险增加。

AI Predicted 5.3 Difficulty: Easy EPSS 0.47% · P39

Possible ATT&CK Techniques 1 AI

T1114 · Email Collection
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I. Basic Information for CVE-2025-53102

Vulnerability Information
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Vulnerability Title
Discourse's WebAuthn challenge isn't cleared from user session after authentication
Source: CVE Program / CVE List V5
Vulnerability Description
Discourse is an open-source community discussion platform. Prior to version 3.4.7 on the `stable` branch and version 3.5.0.beta.8 on the `tests-passed` branch, upon issuing a physical security key for 2FA, the server generates a WebAuthn challenge, which the client signs. The challenge is not cleared from the user’s session after authentication, potentially allowing reuse and increasing security risk. This is fixed in versions 3.4.7 and 3.5.0.beta.8.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
会话固定
Source: CVE Program / CVE List V5
Vulnerability Title
Discourse 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Discourse是Discourse开源的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 3.4.7之前版本和3.5.0.beta.8之前版本存在授权问题漏洞，该漏洞源于WebAuthn挑战未清除，可能导致安全风险增加。
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 >= 3.5.0.beta1, < 3.5.0.beta.8 -

II. Public POCs for CVE-2025-53102

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III. Intelligence Information for CVE-2025-53102

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IV. Related Vulnerabilities

Same product: discourse
Same vendor: discourse
Same weakness: CWE-384

V. Comments for CVE-2025-53102

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