FKIE_CVE-2024-39891

Vulnerability from fkie_nvd - Published: 2024-07-02 18:15 - Updated: 2026-06-17 07:42
Severity
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Summary
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.)
References
cve@mitre.orghttps://cwe.mitre.org/data/definitions/203.htmlTechnical Description
cve@mitre.orghttps://www.bleepingcomputer.com/news/security/hackers-abused-api-to-verify-millions-of-authy-mfa-phone-numbers/Press/Media Coverage
cve@mitre.orghttps://www.twilio.com/docs/usage/security/reporting-vulnerabilitiesProduct
cve@mitre.orghttps://www.twilio.com/en-us/changelogRelease Notes
af854a3a-2127-422b-91ae-364da2661108https://cwe.mitre.org/data/definitions/203.htmlTechnical Description
af854a3a-2127-422b-91ae-364da2661108https://www.bleepingcomputer.com/news/security/hackers-abused-api-to-verify-millions-of-authy-mfa-phone-numbers/Press/Media Coverage
af854a3a-2127-422b-91ae-364da2661108https://www.twilio.com/docs/usage/security/reporting-vulnerabilitiesProduct
af854a3a-2127-422b-91ae-364da2661108https://www.twilio.com/en-us/changelogRelease Notes
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-39891US Government Resource
Impacted products
Vendor Product Version
twilio authy *
twilio authy_authenticator *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    },
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:twilio:authy_2-factor_authentication:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unknown",
          "product": "authy_2-factor_authentication",
          "vendor": "twilio",
          "versions": [
            {
              "lessThan": "26.1.0",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "lessThan": "25.1.0",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:twilio:authy_2-factor_authentication:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unknown",
          "product": "authy_2-factor_authentication",
          "vendor": "twilio",
          "versions": [
            {
              "lessThan": "26.1.0",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "lessThan": "25.1.0",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "cisaActionDue": "2024-08-13",
  "cisaExploitAdd": "2024-07-23",
  "cisaRequiredAction": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.",
  "cisaVulnerabilityName": "Twilio Authy Information Disclosure Vulnerability",
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:twilio:authy:*:*:*:*:*:iphone_os:*:*",
              "matchCriteriaId": "F645AEA3-6ACC-4386-ACA9-793E66DBF31E",
              "versionEndExcluding": "26.1.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:twilio:authy_authenticator:*:*:*:*:*:android:*:*",
              "matchCriteriaId": "07B60ED3-2C9B-46F8-9B6C-1FFB46067D06",
              "versionEndExcluding": "25.1.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "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.)"
    },
    {
      "lang": "es",
      "value": "En la API de Twilio Authy, a la que acced\u00edan Authy Android antes de la versi\u00f3n 25.1.0 y Authy iOS antes de la versi\u00f3n 26.1.0, un endpoint no autenticado proporcionaba acceso a determinados datos de n\u00fameros de tel\u00e9fono, como se explot\u00f3 en junio de 2024. En concreto, el endpoint aceptaba un flujo de solicitudes que conten\u00edan n\u00fameros de tel\u00e9fono y respond\u00eda con informaci\u00f3n sobre si cada n\u00famero de tel\u00e9fono estaba registrado en Authy. (Sin embargo, las cuentas de Authy no se vieron comprometidas)."
    }
  ],
  "id": "CVE-2024-39891",
  "lastModified": "2026-06-17T07:42:58.630",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "cve@mitre.org",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-39891",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-07-23T03:55:42.678226Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-07-02T18:15:03.447",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Technical Description"
      ],
      "url": "https://cwe.mitre.org/data/definitions/203.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Press/Media Coverage"
      ],
      "url": "https://www.bleepingcomputer.com/news/security/hackers-abused-api-to-verify-millions-of-authy-mfa-phone-numbers/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Product"
      ],
      "url": "https://www.twilio.com/docs/usage/security/reporting-vulnerabilities"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Release Notes"
      ],
      "url": "https://www.twilio.com/en-us/changelog"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Technical Description"
      ],
      "url": "https://cwe.mitre.org/data/definitions/203.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Press/Media Coverage"
      ],
      "url": "https://www.bleepingcomputer.com/news/security/hackers-abused-api-to-verify-millions-of-authy-mfa-phone-numbers/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Product"
      ],
      "url": "https://www.twilio.com/docs/usage/security/reporting-vulnerabilities"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Release Notes"
      ],
      "url": "https://www.twilio.com/en-us/changelog"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "US Government Resource"
      ],
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-39891"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-203"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-203"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.