{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-54721",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-15T23:07:33.231Z",
        "datePublished": "2026-08-27T16:52:46.023Z",
        "dateUpdated": "2026-08-27T16:52:46.023Z"
    },
    "containers": {
        "cna": {
            "title": "Silverstripe UserForms: Remote code execution via userforms email subject",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-94",
                            "lang": "en",
                            "description": "CWE-94: Improper Control of Generation of Code ('Code Injection')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/silverstripe/silverstripe-userforms/security/advisories/GHSA-g8wr-r2v2-vqc6",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/silverstripe/silverstripe-userforms/security/advisories/GHSA-g8wr-r2v2-vqc6"
                },
                {
                    "name": "https://github.com/silverstripe/silverstripe-userforms/pull/1441",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/silverstripe/silverstripe-userforms/pull/1441"
                },
                {
                    "name": "https://github.com/silverstripe/silverstripe-userforms/pull/1442",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/silverstripe/silverstripe-userforms/pull/1442"
                },
                {
                    "name": "https://github.com/silverstripe/silverstripe-userforms/commit/23c069866900c19b499bfa997d1e251e97491702",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/silverstripe/silverstripe-userforms/commit/23c069866900c19b499bfa997d1e251e97491702"
                },
                {
                    "name": "https://github.com/silverstripe/silverstripe-userforms/commit/c55494ad7c717b199a3c1663b43a54db5d95604c",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/silverstripe/silverstripe-userforms/commit/c55494ad7c717b199a3c1663b43a54db5d95604c"
                },
                {
                    "name": "https://github.com/silverstripe/silverstripe-userforms/releases/tag/6.4.9",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/silverstripe/silverstripe-userforms/releases/tag/6.4.9"
                },
                {
                    "name": "https://github.com/silverstripe/silverstripe-userforms/releases/tag/7.0.7",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/silverstripe/silverstripe-userforms/releases/tag/7.0.7"
                },
                {
                    "name": "https://github.com/silverstripe/silverstripe-userforms/releases/tag/7.1.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/silverstripe/silverstripe-userforms/releases/tag/7.1.1"
                }
            ],
            "affected": [
                {
                    "vendor": "silverstripe",
                    "product": "silverstripe-userforms",
                    "versions": [
                        {
                            "version": "< 6.4.9",
                            "status": "affected"
                        },
                        {
                            "version": ">= 7.0.0, < 7.0.7",
                            "status": "affected"
                        },
                        {
                            "version": ">= 7.1.0, < 7.1.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-27T16:52:46.023Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Silverstripe UserForms provides a visual form builder for the Silverstripe CMS. From 6.0.0 until 6.4.9, 7.0.7, and 7.1.1, the userform email recipient subject field in the CMS accepts a specially crafted payload that can be interpreted as executable server-side code. An authenticated CMS user with permission to configure a UserForms email recipient can use the subject field to run arbitrary code on the server, compromising confidentiality, integrity, and availability. This issue is fixed in versions 6.4.9, 7.0.7, and 7.1.1."
                }
            ],
            "source": {
                "advisory": "GHSA-g8wr-r2v2-vqc6",
                "discovery": "UNKNOWN"
            }
        }
    }
}