cvelist/2021/41xxx/CVE-2021-41178.json

{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-41178",
        "STATE": "PUBLIC",
        "TITLE": "File Traversal affecting SVG files on Nextcloud Server"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "security-advisories",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "20.0.13"
                                        },
                                        {
                                            "version_value": ">= 21.0.0, < 21.0.5"
                                        },
                                        {
                                            "version_value": "< 22.2.0"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "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. Prior to versions 20.0.13, 21.0.5, and 22.2.0, a file traversal vulnerability makes an attacker able to download arbitrary SVG images from the host system, including user provided files. This could also be leveraged into a XSS/phishing attack, an attacker could upload a malicious SVG file that mimics the Nextcloud login form and send a specially crafted link to victims. The XSS risk here is mitigated due to the fact that Nextcloud employs a strict Content-Security-Policy disallowing execution of arbitrary JavaScript. It is recommended that the Nextcloud Server be upgraded to 20.0.13, 21.0.5 or 22.2.0. There are no known workarounds aside from upgrading."
            }
        ]
    },
    "impact": {
        "cvss": {
            "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"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-23: Relative Path Traversal"
                    }
                ]
            },
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-434: Unrestricted Upload of File with Dangerous Type"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jp9c-vpr3-m5rf",
                "refsource": "CONFIRM",
                "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jp9c-vpr3-m5rf"
            },
            {
                "name": "https://github.com/nextcloud/server/pull/28726",
                "refsource": "MISC",
                "url": "https://github.com/nextcloud/server/pull/28726"
            },
            {
                "name": "https://hackerone.com/reports/1302155",
                "refsource": "MISC",
                "url": "https://hackerone.com/reports/1302155"
            },
            {
                "refsource": "GENTOO",
                "name": "GLSA-202208-17",
                "url": "https://security.gentoo.org/glsa/202208-17"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-jp9c-vpr3-m5rf",
        "discovery": "UNKNOWN"
    }
}