CVSS 4.0
5.1 mediumCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:NCVE-2026-32113
Medium (5.1) in discourse discourse. EPSS 0.2% chance of exploitation in the next 30 days.
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, the enter action in StaticController reads the sso_destination_url cookie and redirects to it with allow_other_host: true without validating the destination URL. While this cookie is normally set during legitimate DiscourseConnect Provider flows with cryptographically validated SSO payloads, cookies are client-controlled and can be set by attackers. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Severity
CVSS 3.1
6.1 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 10% of CVEs (scores of 2026-10-31)
- CWE
- CWE-601
- Published
- Modified
- Record from
- the NVD, synced
Affected
- discourse:discourse
References
- https://github.com/discourse/discourse/commit/080408b93d00305b51d71f63f755f43fa601884d
- https://github.com/discourse/discourse/security/advisories/GHSA-378j-ccw4-4fwh
- https://meta.discourse.org/t/using-discourse-as-a-sso-provider/32974
- https://meta.discourse.org/t/use-discourse-as-an-identity-provider-sso-discourseconnect/32974