Social Engineering Vulnerability in Discourse Open-Source Platform
CVE-2026-33427

2.7LOW

Key Information:

Vendor

Discourse
Status
Discourse
Vendor
CVE Published:
20 March 2026

What is CVE-2026-33427?

An unauthenticated attacker exploiting the vulnerability in the Discourse platform can manipulate a legitimate authorization page to display a malicious, attacker-controlled domain. This misdirection can lead to social engineering attacks that deceive users into providing sensitive information. Versions updated to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 have addressed this issue with critical patches, while no workarounds exist for earlier versions.

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Deploy the Patch

Affected Version(s)

discourse >= 2026.1.0-latest, < 2026.1.2 < 2026.1.0-latest, 2026.1.2

discourse >= 2026.2.0-latest, < 2026.2.1 < 2026.2.0-latest, 2026.2.1

discourse = 2026.3.0-latest = 2026.3.0-latest

References

https://github.com/discourse/discourse/security/advisorie...
x_refsource_CONFIRM

CVSS V4

Score:
2.7
Severity:
LOW
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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