CVE-2026-33427 LOW

CVE-2026-33427: Discourse Authorization Page Displays Unvalidated Redirect Domain

Vendor Discourse
Product discourse
Weakness CWE-862 · Missing authorization
Published March 20, 2026
Last update March 23, 2026
View on NVD All CVEs

CVSS base score

2.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U

What the vulnerability does

01Description

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, an unauthenticated attacker can cause a legitimate Discourse authorization page to display an attacker-controlled domain, facilitating social engineering attacks against users. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

Key dates

02Disclosure timeline

March 20, 2026 CVE published
March 23, 2026 Record updated