CVE-2025-55285 LOW

CVE-2025-55285: @backstage/plugin-scaffolder-backend Template Secret Leakage in Logs in Scaffolder When Using `fetch:template`

Vendor Backstage
Product backstage
Weakness CWE-532 · Sensitive info in logs
Published August 15, 2025
Last update August 15, 2025

CVSS base score

2.6/10
Attack vector Network
Attack complexity High
Privileges required High
User interaction Required
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:N/A:N

What the vulnerability does

01Description

@backstage/plugin-scaffolder-backend is the backend for the default Backstage software templates. Prior to version 2.1.1, duplicate logging of the input values in the fetch:template action in the Scaffolder meant that some of the secrets were not properly redacted. If ${{ secrets.x }} is not passed through to fetch:template there is no impact. This issue has been resolved in 2.1.1 of the scaffolder-backend plugin. A workaround for this issue involves Template Authors removing the use of ${{ secrets }} being used as an argument to fetch:template.

Key dates

02Disclosure timeline

August 15, 2025 CVE published
August 15, 2025 Record updated