{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-28282",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-02-26T01:52:58.735Z",
        "datePublished": "2026-03-19T21:45:13.648Z",
        "dateUpdated": "2026-03-20T18:10:26.922Z"
    },
    "containers": {
        "cna": {
            "title": "Discourse vulnerable to group membership addition permission bypass via discourse-policy plugin",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-863",
                            "lang": "en",
                            "description": "CWE-863: Incorrect Authorization",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "LOW",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 2.3,
                        "baseSeverity": "LOW",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/discourse/discourse/security/advisories/GHSA-6cc8-x3rm-j5pf",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/discourse/discourse/security/advisories/GHSA-6cc8-x3rm-j5pf"
                },
                {
                    "name": "https://github.com/discourse/discourse/commit/64e2514ac17046cfaa8bc68a3c5140bc40736add",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/discourse/discourse/commit/64e2514ac17046cfaa8bc68a3c5140bc40736add"
                },
                {
                    "name": "https://github.com/discourse/discourse/commit/c14b8a4cc5fc94e4839a83c5d55765897589f45b",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/discourse/discourse/commit/c14b8a4cc5fc94e4839a83c5d55765897589f45b"
                },
                {
                    "name": "https://github.com/discourse/discourse/commit/dcde9de530f515e88f99957056ffbcc2e1e03951",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/discourse/discourse/commit/dcde9de530f515e88f99957056ffbcc2e1e03951"
                }
            ],
            "affected": [
                {
                    "vendor": "discourse",
                    "product": "discourse",
                    "versions": [
                        {
                            "version": ">= 2026.1.0-latest, < 2026.1.2",
                            "status": "affected"
                        },
                        {
                            "version": ">= 2026.2.0-latest, < 2026.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "= 2026.3.0-latest",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-03-19T21:48:54.093Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Discourse is an open-source discussion platform. Versions prior to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 have a security flaw in the discourse-policy plugin which allowed a user with policy creation permission to gain membership access to any private/restricted groups. Once membership to a private/restricted group has been obtained, the user will be able to read private topics that only the group has access to. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. As a workaround, review all policies for the use of `add-users-to-group` and temporarily remove the attribute from the policy. Alternatively, disable the discourse-policy plugin by disabling the `policy_enabled` site setting."
                }
            ],
            "source": {
                "advisory": "GHSA-6cc8-x3rm-j5pf",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-03-20T17:00:56.189009Z",
                                "id": "CVE-2026-28282",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-03-20T18:10:26.922Z"
                }
            }
        ]
    }
}