CVE intelligence and bounded remediation
CVE-2021-28154 — Camunda Modeler (aka camunda-modeler) through 4.6.0 allows arbitrary file access
Camunda Modeler (aka camunda-modeler) through 4.6.0 allows arbitrary file access. A remote attacker may send a crafted IPC message to the exposed vulnerable ipcRenderer IPC interface, which manipulates the readFile and writeFile APIs. NOTE: the vendor states "The way we secured the app is that it does not allow any remote scripts to be opened, no unsafe scripts to be evaluated, no remote sites to be browsed.
- Severity
- Critical
- CVSS
- 9.1 (3.1)
- Published
- 2021-03-11
- CISA KEV
- Not currently listed
- Ecosystem
- software/application
- Weaknesses
- CWE-862
Affected products
- camunda / modeler
Matched remediation archetype
Authorization bypass, IDOR, and cross-tenant access
This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.
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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