CVE-2026-28218

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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."}, {"lang": "es", "value": "Discourse es una plataforma de discusi\u00f3n de c\u00f3digo abierto. Antes de las versiones 2025.12.2, 2026.1.1 y 2026.2.0, el control de acceso fail-open en el plugin Data Explorer permite a cualquier usuario autenticado ejecutar consultas SQL que no tienen asignaciones de grupo expl\u00edcitas, incluyendo consultas de sistema integradas. Las versiones 2025.12.2, 2026.1.1 y 2026.2.0 aplican un parche para el problema. Como soluci\u00f3n alternativa, o bien establecer expl\u00edcitamente permisos de grupo en cada consulta de Data Explorer que no tiene permisos, o deshabilitar el plugin discourse-data-explorer."}], "id": "CVE-2026-28218", "lastModified": "2026-06-17T10:28:21.207", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.5, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-28218", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-02T20:58:54.649323Z", "version": "2.0.3"}}]}, "published": "2026-02-26T22:20:49.600", "references": [{"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/discourse/discourse/security/advisories/GHSA-jxrc-72mr-mfh5"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-284"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2025.12.2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2026.1.0-latest,2026.1.1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2026.2.0-latest,2026.2.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "discourse", "source": "cna", "vendor": "discourse"}, "product": "discourse", "vendor": "discourse"}], "analysis": {"en": {"generated_at": "2026-04-16T16:01:37.709536+00:00", "value": {"mitigation_remediation": ["Upgrade to Discourse version 2025.12.2, 2026.1.1, or 2026.2.0 or newer to apply the vendor fix.", "Disable the Data Explorer plugin if it is not required for operations.", "If the plugin must remain enabled, configure explicit group permissions for every Data Explorer query that currently lacks permissions."], "summary": {"action": "Apply Patch", "impact": "Unauthorized Data Access via SQL"}, "threat_synthesis": {"affected_systems": "Discourse products running any version before 2025.12.2, 2026.1.1, or 2026.2.0 are susceptible. The patched releases address the fail\u2011open access control issue. All Discourse installations that rely on the Data Explorer plugin and have not upgraded to one of these fixed versions are at risk.", "description_and_impact": "Discourse\u2019s Data Explorer plugin previously did not enforce group permissions on certain queries, allowing any authenticated user to run arbitrary SQL statements. This Access Control flaw, classified as CWE\u2011284, could let an attacker read or modify sensitive database content, potentially exposing private data or compromising the application. The vulnerability is mitigated by restricting queries to approved groups or disabling the plugin.", "risk_and_exploitability": "This vulnerability has a CVSS score of 5.3, indicating moderate risk. EPSS is below 1%, meaning exploitation is unlikely at this time, and it is not listed in the CISA KEV catalog. An attacker would need only authenticated access and the Data Explorer plugin enabled; no special privileges beyond those required to perform normal user tasks are necessary. Given the low exploitation probability, organizations should still monitor for any suspicious query activity and act promptly when a patch becomes available."}}}}, "created": "2026-02-27T09:04:07.756850+00:00", "updated": "2026-04-16T16:15:08.455631+00:00", "vendors": ["discourse", "discourse$PRODUCT$discourse"]}