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How the CVE Works
The vulnerability (CVE-2025-XXXX) in Backstage Scaffolder arises when using the `fetch:template` action with secrets (${{ secrets.x }}). Due to improper log redaction, sensitive values are duplicated in logs, exposing credentials or API keys. The issue occurs in Scaffolder versions <= 2.1.0, where input values, including secrets, are logged without sanitization. Attackers with log access could extract these secrets, leading to unauthorized access or further exploitation. The flaw is fixed in `scaffolder-backend` plugin version 2.1.1.
DailyCVE Form
Platform: Backstage Scaffolder
Version: <= 2.1.0
Vulnerability: Secret leakage
Severity: Critical
Date: Aug 15, 2025
Prediction: Patch expected Aug 16, 2025
What Undercode Say
Check Scaffolder version backstage-cli versions | grep scaffolder Verify log redaction grep -r "fetch:template" /var/log/backstage Mitigation command npm update @backstage/[email protected]
How Exploit
- Access application logs (e.g., via compromised admin panel).
- Extract secrets from `fetch:template` log entries.
- Use leaked credentials for privilege escalation.
Protection from this CVE
- Upgrade to
[email protected]. - Avoid passing `${{ secrets }}` to
fetch:template. - Audit logs for exposed secrets.
Impact
- Unauthorized access to sensitive systems.
- Credential theft leading to data breaches.
- Compliance violations (e.g., GDPR, HIPAA).
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Sources:
Reported By: github.com
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Undercode
