Unauthorized Access Vulnerability in Discourse Poll Plugin
CVE-2026-27021

6.9MEDIUM

Key Information:

Vendor

Discourse
Status
Discourse
Vendor
CVE Published:
26 February 2026

What is CVE-2026-27021?

The Discourse Poll Plugin has a vulnerability that allows unauthorized users to access sensitive voter details in polling posts. This issue arises due to the absence of adequate post visibility checks, putting user privacy and data integrity at risk. The vulnerability affected Discourse versions before 2025.12.2, 2026.1.1, and 2026.2.0. Users are encouraged to update to the latest versions immediately to protect against potential data breaches.

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Deploy the Patch

Affected Version(s)

discourse < 2025.12.2 < 2025.12.2

discourse >= 2026.1.0-latest, < 2026.1.1 < 2026.1.0-latest, 2026.1.1

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

References

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

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
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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