ghsa-3x3q-ghcp-whf7
Vulnerability from github
Published
2025-08-15 18:43
Modified
2025-09-26 17:19
Severity ?
Summary
Template Secret leakage in logs in Scaffolder when using `fetch:template`
Details
A logging flaw in Backstage Scaffolder’s fetch:template action up to @backstage/plugin-scaffolder-backend 2.1.0 may write template secrets to logs. The action emitted a duplicate, pre-redaction copy of input parameters, so values provided via the {{ secrets }} bag could appear in local/server logs when the action ran. Exploitation requires use of the secrets argument and access to Scaffolder/build logs; integrity and availability are unaffected.
- Fix: upgrade to
2.1.1, which removes the duplicate log path and ensures secrets are redacted. - Mitigation: avoid passing
{{ secrets }}tofetch:templateif upgrade is not possible.
Open an issue in the Backstage repository
Visit our Discord, linked to in Backstage README
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 2.1.0"
},
"package": {
"ecosystem": "npm",
"name": "@backstage/plugin-scaffolder-backend"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2025-55285"
],
"database_specific": {
"cwe_ids": [
"CWE-532"
],
"github_reviewed": true,
"github_reviewed_at": "2025-08-15T18:43:16Z",
"nvd_published_at": "2025-08-15T18:15:27Z",
"severity": "LOW"
},
"details": "A logging flaw in Backstage Scaffolder\u2019s `fetch:template` action up to `@backstage/plugin-scaffolder-backend` **2.1.0** may write template secrets to logs. The action emitted a duplicate, pre-redaction copy of input parameters, so values provided via the `{{ secrets }}` bag could appear in local/server logs when the action ran. Exploitation requires use of the `secrets` argument and access to Scaffolder/build logs; integrity and availability are unaffected.\n\n* **Fix:** upgrade to `2.1.1`, which removes the duplicate log path and ensures secrets are redacted.\n* **Mitigation:** avoid passing `{{ secrets }}` to `fetch:template` if upgrade is not possible.\n\n\u003e Open an issue in the [Backstage repository](https://github.com/backstage/backstage)\n\u003e\n\u003e Visit our Discord, linked to in [Backstage README](https://github.com/backstage/backstage)",
"id": "GHSA-3x3q-ghcp-whf7",
"modified": "2025-09-26T17:19:17Z",
"published": "2025-08-15T18:43:16Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/backstage/backstage/security/advisories/GHSA-3x3q-ghcp-whf7"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-55285"
},
{
"type": "WEB",
"url": "https://github.com/backstage/backstage/commit/c371f6fe12371de31dca537510e6653e287cdc2e"
},
{
"type": "PACKAGE",
"url": "https://github.com/backstage/backstage"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "Template Secret leakage in logs in Scaffolder when using `fetch:template`"
}
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- Confirmed: The vulnerability is confirmed from an analyst perspective.
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