{
    "dataType": "CVE_RECORD",
    "cveMetadata": {
        "state": "PUBLISHED",
        "cveId": "CVE-2024-39891",
        "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "assignerShortName": "mitre",
        "dateUpdated": "2025-10-21T22:55:50.240Z",
        "dateReserved": "2024-07-02T00:00:00.000Z",
        "datePublished": "2024-07-02T00:00:00.000Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
                "shortName": "mitre",
                "dateUpdated": "2024-07-03T22:07:07.423Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Twilio Authy API, accessed by Authy Android before 25.1.0 and Authy iOS before 26.1.0, an unauthenticated endpoint provided access to certain phone-number data, as exploited in the wild in June 2024. Specifically, the endpoint accepted a stream of requests containing phone numbers, and responded with information about whether each phone number was registered with Authy. (Authy accounts were not compromised, however.)"
                }
            ],
            "affected": [
                {
                    "vendor": "n/a",
                    "product": "n/a",
                    "versions": [
                        {
                            "version": "n/a",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://cwe.mitre.org/data/definitions/203.html"
                },
                {
                    "url": "https://www.twilio.com/docs/usage/security/reporting-vulnerabilities"
                },
                {
                    "url": "https://www.twilio.com/en-us/changelog"
                },
                {
                    "url": "https://www.bleepingcomputer.com/news/security/hackers-abused-api-to-verify-millions-of-authy-mfa-phone-numbers/"
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AC:L/AV:N/A:N/C:L/I:N/PR:N/S:U/UI:N",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "NONE",
                        "availabilityImpact": "NONE",
                        "baseScore": 5.3,
                        "baseSeverity": "MEDIUM"
                    }
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "type": "text",
                            "lang": "en",
                            "description": "n/a"
                        }
                    ]
                }
            ]
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2024-39891",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "active"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2024-07-23T03:55:42.678226Z"
                            }
                        }
                    },
                    {
                        "other": {
                            "type": "kev",
                            "content": {
                                "dateAdded": "2024-07-23",
                                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-39891"
                            }
                        }
                    }
                ],
                "affected": [
                    {
                        "cpes": [
                            "cpe:2.3:a:twilio:authy_2-factor_authentication:*:*:*:*:*:*:*:*"
                        ],
                        "vendor": "twilio",
                        "product": "authy_2-factor_authentication",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "0",
                                "lessThan": "26.1.0",
                                "versionType": "custom"
                            },
                            {
                                "status": "affected",
                                "version": "0",
                                "lessThan": "25.1.0",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "cpes": [
                            "cpe:2.3:a:twilio:authy_2-factor_authentication:*:*:*:*:*:*:*:*"
                        ],
                        "vendor": "twilio",
                        "product": "authy_2-factor_authentication",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "0",
                                "lessThan": "26.1.0",
                                "versionType": "custom"
                            },
                            {
                                "status": "affected",
                                "version": "0",
                                "lessThan": "25.1.0",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    }
                ],
                "references": [
                    {
                        "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-39891",
                        "tags": [
                            "government-resource"
                        ]
                    }
                ],
                "problemTypes": [
                    {
                        "descriptions": [
                            {
                                "lang": "en",
                                "type": "CWE",
                                "cweId": "CWE-203",
                                "description": "CWE-203 Observable Discrepancy"
                            }
                        ]
                    }
                ],
                "timeline": [
                    {
                        "time": "2024-07-23T00:00:00.000Z",
                        "lang": "en",
                        "value": "CVE-2024-39891 added to CISA KEV"
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2025-10-21T22:55:50.240Z"
                }
            },
            {
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2024-08-02T04:33:11.402Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "https://cwe.mitre.org/data/definitions/203.html",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://www.twilio.com/docs/usage/security/reporting-vulnerabilities",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://www.twilio.com/en-us/changelog",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://www.bleepingcomputer.com/news/security/hackers-abused-api-to-verify-millions-of-authy-mfa-phone-numbers/",
                        "tags": [
                            "x_transferred"
                        ]
                    }
                ]
            }
        ]
    },
    "dataVersion": "5.1"
}