CVE-2026-33427CWE-862

Discourse Authorization Page Displays Unvalidated Redirect Domain

Low · published March 20, 2026

CVSS v4.0
2.7
EPSS
0%
Percentile
29.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
2.7 · LOW
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
EPSS
0.00372 · 29.9th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-03-20T23:20Z
EPSS history
Timeline
  • 20 MAR 23:20Z
    Discourse Authorization Page Displays Unvalidated Redirect Domain
    cvelistv5