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Description

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, fail-open access control in Data Explorer plugin allows any authenticated user to execute SQL queries that have no explicit group assignments, including built-in system queries. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. As a workaround, either explicitly set group permissions on each Data Explorer query that doesn't have permissions, or disable discourse-data-explorer plugin.

PUBLISHED Reserved 2026-02-25 | Published 2026-02-26 | Updated 2026-02-26 | Assigner GitHub_M




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-284: Improper Access Control

Product status

< 2025.12.2
affected

>= 2026.1.0-latest, < 2026.1.1
affected

>= 2026.2.0-latest, < 2026.2.0
affected

References

github.com/...course/security/advisories/GHSA-jxrc-72mr-mfh5

cve.org (CVE-2026-28218)

nvd.nist.gov (CVE-2026-28218)

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