Vulnerability-Lookup

CVE-2026-27449 (GCVE-0-2026-27449)

Vulnerability from cvelistv5 – Published: 2026-02-26 21:51 – Updated: 2026-03-03 01:40

Title

Umbraco.Engage.Forms Allows Unauthorized Access to Multiple API Endpoints

Summary

Umbraco Engage is a business intelligence platform. A vulnerability has been identified in Umbraco Engage prior to versions 16.2.1 and 17.1.1 where certain API endpoints are exposed without enforcing authentication or authorization checks. The affected endpoints can be accessed directly over the network without requiring a valid session or user credentials. By supplying a user-controlled identifier parameter (e.g., ?id=), an attacker can retrieve sensitive data associated with arbitrary records. Because no access control validation is performed, the endpoints are vulnerable to enumeration attacks, allowing attackers to iterate over identifiers and extract data at scale. An unauthenticated attacker can retrieve sensitive Engage-related data by directly querying the affected API endpoints. The vulnerability allows arbitrary record access through predictable or enumerable identifiers. The confidentiality impact is considered high. No direct integrity or availability impact has been identified. The scope of exposed data depends on the deployment but may include analytics data, tracking data, customer-related information, or other Engage-managed content. The vulnerability affects both v16 and v17. Patches have already been released. Users are advised to update to 16.2.1 or 17.1.1. No known workarounds are available.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-03 01:40 UTC

CWE

CWE-284 - Improper Access Control
CWE-306 - Missing Authentication for Critical Function
CWE-639 - Authorization Bypass Through User-Controlled Key

Assigner

GitHub_M mitre root

References

1 reference

URL	Tags
https://github.com/umbraco/Umbraco.Engage.Issues/…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
umbraco	Umbraco.Engage.Forms	Affected: < 16.2.1 Affected: >= 17.0.0, < 17.1.1

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-27449

Vulnerability from fkie_nvd - Published: 2026-02-26 22:20 - Updated: 2026-06-17 10:27

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/umbraco/Umbraco.Engage.Issues/security/advisories/GHSA-86vq-ccwf-rm62

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Umbraco.Engage.Forms",
          "vendor": "umbraco",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 16.2.1"
            },
            {
              "status": "affected",
              "version": "\u003e= 17.0.0, \u003c 17.1.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Umbraco Engage is a business intelligence platform. A vulnerability has been identified in Umbraco Engage prior to versions 16.2.1 and 17.1.1 where certain API endpoints are exposed without enforcing authentication or authorization checks. The affected endpoints can be accessed directly over the network without requiring a valid session or user credentials. By supplying a user-controlled identifier parameter (e.g., ?id=), an attacker can retrieve sensitive data associated with arbitrary records. Because no access control validation is performed, the endpoints are vulnerable to enumeration attacks, allowing attackers to iterate over identifiers and extract data at scale. An unauthenticated attacker can retrieve sensitive Engage-related data by directly querying the affected API endpoints. The vulnerability allows arbitrary record access through predictable or enumerable identifiers. The confidentiality impact is considered high. No direct integrity or availability impact has been identified. The scope of exposed data depends on the deployment but may include analytics data, tracking data, customer-related information, or other Engage-managed content. The vulnerability affects both v16 and v17. Patches have already been released. Users are advised to update to 16.2.1 or 17.1.1. No known workarounds are available."
    },
    {
      "lang": "es",
      "value": "Umbraco Engage es una plataforma de inteligencia de negocios. Una vulnerabilidad ha sido identificada en Umbraco Engage en versiones anteriores a la 16.2.1 y 17.1.1 donde ciertos endpoints de la API est\u00e1n expuestos sin aplicar comprobaciones de autenticaci\u00f3n o autorizaci\u00f3n. Los endpoints afectados pueden ser accedidos directamente a trav\u00e9s de la red sin requerir una sesi\u00f3n v\u00e1lida o credenciales de usuario. Al proporcionar un par\u00e1metro identificador controlado por el usuario (por ejemplo, ?id=), un atacante puede recuperar datos sensibles asociados con registros arbitrarios. Debido a que no se realiza ninguna validaci\u00f3n de control de acceso, los endpoints son vulnerables a ataques de enumeraci\u00f3n, permitiendo a los atacantes iterar sobre identificadores y extraer datos a escala. Un atacante no autenticado puede recuperar datos sensibles relacionados con Engage consultando directamente los endpoints de la API afectados. La vulnerabilidad permite el acceso arbitrario a registros a trav\u00e9s de identificadores predecibles o enumerables. El impacto en la confidencialidad se considera alto. No se ha identificado ning\u00fan impacto directo en la integridad o disponibilidad. El alcance de los datos expuestos depende de la implementaci\u00f3n, pero puede incluir datos anal\u00edticos, datos de seguimiento, informaci\u00f3n relacionada con clientes u otro contenido gestionado por Engage. La vulnerabilidad afecta tanto a la v16 como a la v17. Los parches ya han sido lanzados. Se aconseja a los usuarios actualizar a la 16.2.1 o 17.1.1. No se conocen soluciones alternativas disponibles."
    }
  ],
  "id": "CVE-2026-27449",
  "lastModified": "2026-06-17T10:27:10.683",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-27449",
          "options": [
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            },
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            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-03T01:40:06.862571Z",
          "version": "2.0.3"
        }
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  },
  "published": "2026-02-26T22:20:47.960",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/umbraco/Umbraco.Engage.Issues/security/advisories/GHSA-86vq-ccwf-rm62"
    }
  ],
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  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        },
        {
          "lang": "en",
          "value": "CWE-306"
        },
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-86VQ-CCWF-RM62

Vulnerability from github – Published: 2026-02-27 18:35 – Updated: 2026-03-19 16:13

Summary

Umbraco.Engage.Forms Allows Unauthorized Access to Multiple API Endpoints

Details

Description

A vulnerability has been identified in Umbraco Engage where certain API endpoints are exposed without enforcing authentication or authorization checks. The affected endpoints can be accessed directly over the network without requiring a valid session or user credentials. By supplying a user-controlled identifier parameter (e.g., ?id=), an attacker can retrieve sensitive data associated with arbitrary records.

Because no access control validation is performed, the endpoints are vulnerable to enumeration attacks, allowing attackers to iterate over identifiers and extract data at scale.

Impact

An unauthenticated attacker can retrieve sensitive Engage-related data by directly querying the affected API endpoints. The vulnerability allows arbitrary record access through predictable or enumerable identifiers.

The confidentiality impact is considered high. No direct integrity or availability impact has been identified.

The scope of exposed data depends on the deployment but may include analytics data, tracking data, customer-related information, or other Engage-managed content.

Patches

The vulnerability affects both v16 and v17. Patches have already been released. Users are advised to update to 16.2.1 or 17.1.1

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

References

Are there any links users can visit to find out more?

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "Umbraco.Engage.Forms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "16.0.0"
            },
            {
              "fixed": "16.2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "Umbraco.Engage.Forms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.0.0"
            },
            {
              "fixed": "17.1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-27449"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284",
      "CWE-306",
      "CWE-639"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-27T18:35:57Z",
    "nvd_published_at": "2026-02-26T22:20:47Z",
    "severity": "HIGH"
  },
  "details": "### Description\nA vulnerability has been identified in Umbraco Engage where certain API endpoints are exposed without enforcing authentication or authorization checks. The affected endpoints can be accessed directly over the network without requiring a valid session or user credentials. By supplying a user-controlled identifier parameter (e.g., ?id=), an attacker can retrieve sensitive data associated with arbitrary records.\n\nBecause no access control validation is performed, the endpoints are vulnerable to enumeration attacks, allowing attackers to iterate over identifiers and extract data at scale.\n\n### Impact\nAn unauthenticated attacker can retrieve sensitive Engage-related data by directly querying the affected API endpoints. The vulnerability allows arbitrary record access through predictable or enumerable identifiers.\n\nThe confidentiality impact is considered high. No direct integrity or availability impact has been identified.\n\nThe scope of exposed data depends on the deployment but may include analytics data, tracking data, customer-related information, or other Engage-managed content.\n\n### Patches\nThe vulnerability affects both v16 and v17. Patches have already been released. Users are advised to update to 16.2.1 or 17.1.1\n\n### Workarounds\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\n\n### References\n_Are there any links users can visit to find out more?_",
  "id": "GHSA-86vq-ccwf-rm62",
  "modified": "2026-03-19T16:13:28Z",
  "published": "2026-02-27T18:35:57Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/umbraco/Umbraco.Engage.Issues/security/advisories/GHSA-86vq-ccwf-rm62"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27449"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/umbraco/Umbraco.Engage.Issues"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Umbraco.Engage.Forms Allows Unauthorized Access to Multiple API Endpoints"
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

CVE-2026-27449 (GCVE-0-2026-27449)

FKIE_CVE-2026-27449

GHSA-86VQ-CCWF-RM62

Description

Impact

Patches

Workarounds

References

Tags

Sightings

Nomenclature

Related by attack behaviour