CVE-2023-31999

CVSS 3.1 Score 8.8 of 10 (high)

Details

Published Jul 4, 2023
Updated: Jul 17, 2023
CWE ID 352

Summary

CVE-2023-31999 affects all versions of the @fastify/oauth2 library. The vulnerability arises from the use of a statically generated state parameter at startup time, which is applied to all requests for all users. This goes against the best security practices for OAuth2 state parameters, which should be unique per user and connected to their session. The new version, 7.2.0, addresses this issue by storing the state in a cookie with http-only and same-site=lax attributes, and generating a new state for each user. This change results in a breaking change in the checkStateFunction function, which now accepts the full Request object.

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