CVE-2026-27021

MEDIUM

Discourse <2025.12.2/2026.1.1/2026.2.0 - Info Disclosure

Title source: llm
STIX 2.1

Description

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, the voters endpoint in the poll plugin lacked post visibility checks which allowed unauthorized access to voters details of polls in any post. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.

References (1)

Core 1
Core References

Scores

CVSS v3 5.3
EPSS 0.0002
EPSS Percentile 6.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-862
Status published
Products (2)
discourse/discourse 2026.2.0
discourse/discourse < 2025.12.0
Published Feb 26, 2026
Tracked Since Feb 27, 2026