CVE-2021-41263: Exposure of Sensitive Information to an Unauthorized Actor

November 15, 2021 (updated August 9, 2022)

rails_multisite provides multi-db support for Rails applications.Depending on how the application makes use of these cookies, it may be possible for an attacker to re-use cookies on different ‘sites’ within a multi-site Rails application. The issue has been patched in v4 of the rails_multisite gem. Note that this upgrade will invalidate all previous signed/encrypted cookies. The impact of this invalidation will vary based on the application architecture.

References

github.com/discourse/rails_multisite/commit/c6785cdb5c9277dd2c5ac8d55180dd1ece440ed0
github.com/discourse/rails_multisite/security/advisories/GHSA-844m-cpr9-jcmh
nvd.nist.gov/vuln/detail/CVE-2021-41263

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