{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-39222",
        "STATE": "PUBLIC",
        "TITLE": "XSS in Talk"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "security-advisories",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 10.0.7"
                                        },
                                        {
                                            "version_value": ">= 10.1.0, < 10.1.4"
                                        },
                                        {
                                            "version_value": ">= 11.1.0, < 11.1.2"
                                        },
                                        {
                                            "version_value": "< 11.2.0"
                                        },
                                        {
                                            "version_value": ">= 12.0.0.alpha-1, < 12.0.0"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "nextcloud"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Talk application was vulnerable to a stored Cross-Site Scripting (XSS) vulnerability. For exploitation, a user would need to right-click on a malicious file and open the file in a new tab. Due the strict Content-Security-Policy shipped with Nextcloud, this issue is not exploitable on modern browsers supporting Content-Security-Policy. It is recommended that the Nextcloud Talk application is upgraded to patched versions 10.0.7, 10.1.4, 11.1.2, 11.2.0 or 12.0.0. As a workaround, use a browser that has support for Content-Security-Policy."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-434: Unrestricted Upload of File with Dangerous Type"
                    }
                ]
            },
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xhxq-f4vg-jw5g",
                "refsource": "CONFIRM",
                "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xhxq-f4vg-jw5g"
            },
            {
                "name": "https://github.com/nextcloud/spreed/pull/542",
                "refsource": "MISC",
                "url": "https://github.com/nextcloud/spreed/pull/542"
            },
            {
                "name": "https://hackerone.com/reports/1135481",
                "refsource": "MISC",
                "url": "https://hackerone.com/reports/1135481"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-xhxq-f4vg-jw5g",
        "discovery": "UNKNOWN"
    }
}