Overly Permissive Trust Policy in Harmonix on AWS EKS
Bulletin ID: AWS-2025-031 Scope: AWS Content Type: Informational Publication Date: 2025/12/15 11:45 AM PST Description: Harmonix on AWS is an open source reference architecture and implementation of a Developer Platform that extends the CNCF Backstage project. We identified CVE-2025-14503 where an overly-permissive IAM trust policy in the Harmonix on AWS framework may allow authenticated users to escalate privileges via role assumption. The sample code for the EKS environment provisioning role is configured to trust the account root principal, which may enable any account principal with sts:AssumeRole permissions to assume the role with administrative privileges. Resolution: v0.3.0 through v0.4.1
CSIRTS triage
- What
- An overly-permissive IAM trust policy may allow privilege escalation via role assumption.
- Who is affected
- Authenticated users of Harmonix on AWS.
- Urgency
- Remediation is necessary to prevent potential privilege escalation.
- Action
- Update the IAM trust policy in Harmonix on AWS to restrict permissions.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://aws.amazon.com/security/security-bulletins/rss/aws-2025-031/
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2025-145030.50% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2025-14503 | coverage & exploitation status | NVD · CVE.org |
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