CVE intelligence and bounded remediation

CVE-2020-21990 — Domoticz Mydomoathome security vulnerability

High CVSS 7.5

Emmanuel MyDomoAtHome (MDAH) REST API REST API Domoticz ISS Gateway 0.2.40 is affected by an information disclosure vulnerability due to improper access control enforcement. An unauthenticated remote attacker can exploit this, via a specially crafted request to gain access to sensitive information.

Severity
High
CVSS
7.5 (3.1)
Published
2021-04-29
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-863

Affected products

  • domoticz / mydomoathome / 0.240

Matched remediation archetype

Authorization bypass, IDOR, and cross-tenant access

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Check exposure

  • Map object and action authorization checks across API, UI, batch, import/export, and background-job paths.
  • Identify tenant, ownership, role, and policy boundaries for affected resources and administrative operations.
  • Use synthetic fixtures to compare intended access matrices without accessing another user's real data.

Remediate safely

  • Enforce server-side authorization at each resource access and state transition using the authenticated principal and trusted tenant context.
  • Scope data queries by tenant and ownership; treat client-supplied identifiers, roles, and policy claims as untrusted.
  • Add deny-by-default policy tests for horizontal and vertical access across every affected transport.

Authoritative sources

Complete CVE record and remediation plan

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