GHSA-8qp7-fhr9-fw53
@backstage/plugin-scaffolder-backend Vulnerable to Potential Session Token Exfiltration via Log Redaction Bypass
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @backstage/plugin-scaffolder-backend | < 3.1.4 | 3.1.4 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
A malicious scaffolder template can bypass the log redaction mechanism to exfiltrate secrets provided run through task event logs.
The attack requires:
- The ability to register a template in the catalog
- A victim who executes the malicious template
### Patches
Patched in `@backstage/plugin-scaffolder-backend` version 3.1.4
### Workarounds
- Implement a custom permission policy that restricts scaffolder.task.read so users can only read their own task logs
- Restrict who can register templates in the catalog to trusted users only
### Resources
- Backstage Scaffolder permissions documentation: https://backstage.io/docs/permissions/plugin-authors/01-setup/
- Backstage Threat Model: https://backstage.io/docs/overview/threat-model/
References
External links from the advisory. They lead to third-party sites.