{
    "data_type": "CVE",
    "data_format": "MITRE",
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    "CVE_data_meta": {
        "ID": "CVE-2021-31406",
        "ASSIGNER": "security@vaadin.com",
        "DATE_PUBLIC": "2021-03-19T09:17:00.000Z",
        "TITLE": "Timing side channel vulnerability in endpoint request handler in Vaadin 15-19",
        "AKA": "",
        "STATE": "PUBLIC"
    },
    "source": {
        "defect": [],
        "advisory": "",
        "discovery": "EXTERNAL"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Vaadin",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Vaadin",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_name": "",
                                            "version_affected": ">=",
                                            "version_value": "15.0.0",
                                            "platform": ""
                                        },
                                        {
                                            "version_name": "",
                                            "version_affected": "<=",
                                            "version_value": "18.0.6",
                                            "platform": ""
                                        },
                                        {
                                            "version_name": "",
                                            "version_affected": "=",
                                            "version_value": "19.0.0",
                                            "platform": ""
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "flow-server",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_name": "",
                                            "version_affected": ">=",
                                            "version_value": "3.0.0",
                                            "platform": ""
                                        },
                                        {
                                            "version_name": "",
                                            "version_affected": "<=",
                                            "version_value": "5.0.3",
                                            "platform": ""
                                        },
                                        {
                                            "version_name": "",
                                            "version_affected": "=",
                                            "version_value": "6.0.0",
                                            "platform": ""
                                        }
                                    ]
                                }
                            }
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                }
            ]
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-208 Information Exposure Through Timing Discrepancy"
                    }
                ]
            }
        ]
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Non-constant-time comparison of CSRF tokens in endpoint request handler in com.vaadin:flow-server versions 3.0.0 through 5.0.3 (Vaadin 15.0.0 through 18.0.6), and com.vaadin:fusion-endpoint version 6.0.0 (Vaadin 19.0.0) allows attacker to guess a security token for Fusion endpoints via timing attack."
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "refsource": "MISC",
                "url": "https://vaadin.com/security/cve-2021-31406",
                "name": "https://vaadin.com/security/cve-2021-31406"
            },
            {
                "refsource": "MISC",
                "url": "https://github.com/vaadin/flow/pull/10157",
                "name": "https://github.com/vaadin/flow/pull/10157"
            }
        ]
    },
    "configuration": [],
    "impact": {
        "cvss": {
            "version": "3.1",
            "attackVector": "LOCAL",
            "attackComplexity": "HIGH",
            "privilegesRequired": "NONE",
            "userInteraction": "NONE",
            "scope": "UNCHANGED",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "availabilityImpact": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
            "baseScore": 4,
            "baseSeverity": "MEDIUM"
        }
    },
    "exploit": [],
    "work_around": [],
    "solution": [],
    "credit": [
        {
            "lang": "eng",
            "value": "This issue was discovered and responsibly reported by Xhelal Likaj."
        }
    ]
}