{
    "containers": {
        "cna": {
            "title": "October CMS vulnerable to Potential Host Header Poisoning on misconfigured servers",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-644",
                            "lang": "en",
                            "description": "CWE-644: Improper Neutralization of HTTP Headers for Scripting Syntax",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 6.8,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "CHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/octobercms/october/security/advisories/GHSA-xhfx-hgmf-v6vp",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/octobercms/october/security/advisories/GHSA-xhfx-hgmf-v6vp"
                },
                {
                    "name": "https://github.com/octobercms/library/commit/f29865ae3db7a03be7c49294cd93980ec457f10d",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/octobercms/library/commit/f29865ae3db7a03be7c49294cd93980ec457f10d"
                },
                {
                    "name": "https://github.com/octobercms/library/commit/f86fcbcd066d6f8b939e8fe897409d152b11c3c6",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/octobercms/library/commit/f86fcbcd066d6f8b939e8fe897409d152b11c3c6"
                },
                {
                    "name": "https://github.com/octobercms/october/commit/555ab61f2313f45d7d5d138656420ead536c5d30",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/octobercms/october/commit/555ab61f2313f45d7d5d138656420ead536c5d30"
                },
                {
                    "name": "https://github.com/octobercms/october/commit/f638d3f78cfe91d7f6658820f9d5e424306a3db0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/octobercms/october/commit/f638d3f78cfe91d7f6658820f9d5e424306a3db0"
                },
                {
                    "name": "https://packagist.org/packages/october/backend",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://packagist.org/packages/october/backend"
                }
            ],
            "affected": [
                {
                    "vendor": "octobercms",
                    "product": "october",
                    "versions": [
                        {
                            "version": "< 1.1.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2025-05-29T23:27:29.528Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. In October before version 1.1.2, when running on poorly configured servers (i.e. the server routes any request, regardless of the HOST header to an October CMS instance) the potential exists for Host Header Poisoning attacks to succeed. This has been addressed in version 1.1.2 by adding a feature to allow a set of trusted hosts to be specified in the application. As a workaround one may set the configuration setting cms.linkPolicy to force."
                }
            ],
            "source": {
                "advisory": "GHSA-xhfx-hgmf-v6vp",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2024-08-03T18:09:15.269Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "tags": [
                            "x_refsource_CONFIRM",
                            "x_transferred"
                        ],
                        "url": "https://github.com/octobercms/october/security/advisories/GHSA-xhfx-hgmf-v6vp"
                    },
                    {
                        "tags": [
                            "x_refsource_MISC",
                            "x_transferred"
                        ],
                        "url": "https://github.com/octobercms/library/commit/f86fcbcd066d6f8b939e8fe897409d152b11c3c6"
                    },
                    {
                        "tags": [
                            "x_refsource_MISC",
                            "x_transferred"
                        ],
                        "url": "https://github.com/octobercms/october/commit/f638d3f78cfe91d7f6658820f9d5e424306a3db0"
                    }
                ]
            }
        ]
    },
    "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2021-21265",
        "datePublished": "2021-03-10T21:15:15.000Z",
        "dateReserved": "2020-12-22T00:00:00.000Z",
        "dateUpdated": "2025-05-29T23:27:29.528Z",
        "state": "PUBLISHED"
    },
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1"
}