Vulnerability details

CVE-2026-27449

umbraco Umbraco.Engage.Forms

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

CVSS 3.1
7.5High

Official description

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.

CVSS scores

ScoreVersionSourceVector
7.5High 3.1 CVEProject cvelistV5 (CNA) (GitHub_M) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

VendorProductVersionsSource
umbraco Umbraco.Engage.Forms < 16.2.1 CVEProject cvelistV5 (CNA)
umbraco Umbraco.Engage.Forms >= 17.0.0, < 17.1.1 CVEProject cvelistV5 (CNA)

References and advisories

1
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Details

Published
2026-02-27
Last updated
2026-03-03
State
Published
Assigner (CNA)
GitHub_M

Exploit prediction (EPSS)

0.4%
Probability of exploitation in 30 days
35.3%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
Yes
Exploitation
None
Technical impact
Partial

Weaknesses (CWE)

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