{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-66514",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2025-12-03T15:28:02.992Z",
        "datePublished": "2025-12-05T17:32:25.767Z",
        "dateUpdated": "2025-12-08T20:10:21.710Z"
    },
    "containers": {
        "cna": {
            "title": "Nextcloud Mail stored HTML injection in subject text",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-79",
                            "lang": "en",
                            "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 3.5,
                        "baseSeverity": "LOW",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v394-8gpc-6fv5",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v394-8gpc-6fv5"
                },
                {
                    "name": "https://github.com/nextcloud/mail/pull/11740",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/nextcloud/mail/pull/11740"
                },
                {
                    "name": "https://github.com/nextcloud/mail/commit/c64fcc3b79e0c089b5e1d2e04a07bfa740b2ac09",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/nextcloud/mail/commit/c64fcc3b79e0c089b5e1d2e04a07bfa740b2ac09"
                },
                {
                    "name": "https://hackerone.com/reports/3357036",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://hackerone.com/reports/3357036"
                }
            ],
            "affected": [
                {
                    "vendor": "nextcloud",
                    "product": "security-advisories",
                    "versions": [
                        {
                            "version": ">= 5.2.0-beta.1, < 5.5.3",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2025-12-05T17:32:25.767Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Nextcloud Mail is the mail app for Nextcloud, a self-hosted productivity platform. Prior to 5.5.3, a stored HTML injection in the Mail app's message list allowed an authenticated user to inject HTML into the email subjects. Javascript was correctly blocked by the content security policy of the Nextcloud Server code."
                }
            ],
            "source": {
                "advisory": "GHSA-v394-8gpc-6fv5",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2025-12-08T20:10:07.643433Z",
                                "id": "CVE-2025-66514",
                                "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": "2025-12-08T20:10:21.710Z"
                }
            }
        ]
    }
}