Descripción
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.
CVSS 6.1EPSS 0.193%Riesgo 0.62
Ver fuente- Publicación
- 2026-03-31 18:16:49
- Versiones afectadas
- <2026.1.3, <2026.2.2, <2026.3.0
- Tipo
- Core software
- Última modificación
- 2026-07-24 20:10:00
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N