CVE-2025-53102 - CVE House
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Status published High CVE-2025-53102

Discourse's WebAuthn challenge isn't cleared from user session after authentication

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

discourse
Vulnerable Versions:
>= 3.5.0.beta1, < 3.5.0.beta.8, < 3.4.7

Timeline

Official Publish: July 29th, 2025
Last Modified: July 29th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)

CWE-384

MITRE ATT&CK TTPs

T1189 Drive-by Compromise
Initial Access
T1078 Valid Accounts
Persistence
T1539 Steal Web Session Cookie
Credential Access