CVE-2026-33427 Details
Description
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.
A vulnerability exists in Discourse, an open-source discussion platform, prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2. This vulnerability allows an unauthenticated attacker to manipulate a legitimate Discourse authorization page to display an attacker-controlled domain. This could facilitate social engineering attacks against users.
Users are advised to update to Discourse versions 2026.3.0-latest.1, 2026.2.1, or 2026.1.2.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 23, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/discourse/discourse/security/advisories/GHSA-9vhg-2mx3-mqfr | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-862 | Missing Authorization | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| discourse discourse | >= 2026.1.0, < 2026.1.2 >= 2026.2.0, < 2026.2.1 2026.3.0 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 24, 2026 | Initial Analysis | [email protected] |
| Mar 21, 2026 | New CVE Received | [email protected] |