Information disclosure in Discourse Rails Multisite
CVE-2021-41263
rails_multisite provides multi-db support for Rails applications. In affected versions this vulnerability impacts any Rails applications using `rails_multisite` alongside Rails' signed/encrypted cookies. 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.
Vulnerability class: Information Disclosure
EPSS: 0.006 (45.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H.
Affected products
- Discourse Rails_multisite — versions < 4.0.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-41263?
- CVE-2021-41263 is a high-severity vulnerability in Discourse Rails Multisite, classified under Information Disclosure. CVSS score: 8.3/10. Published 2021-11-15.
- How severe is CVE-2021-41263?
- High severity. CVSS v3 base score is 8.3 out of 10.