{"id":"CVE-2025-55285","aliases":["EUVD-2025-25046","GHSA-3x3q-ghcp-whf7"],"status":"published","title":"@backstage/plugin-scaffolder-backend Template Secret Leakage in Logs in Scaffolder When Using `fetch:template`","description":"@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.","severity":{"version":"3.1","score":2.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:N/A:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00262,"percentile":0.18143,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-532"],"published":"2025-08-15T17:10:26Z","modified":"2026-10-28T02:31:11Z","fixes":[{"ecosystem":"npm","package":"@backstage/plugin-scaffolder-backend","fixed_in":["2.1.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"@backstage/plugin-scaffolder-backend","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.1.0"},{"fixed":"2.1.1"}]}]},{"source":"osv","ecosystem":"npm","package":"@backstage/plugin-scaffolder-backend","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.1.1"}]}]}],"products":[{"vendor":"backstage","product":"backstage"}],"references":[{"url":"https://github.com/backstage/backstage/security/advisories/GHSA-3x3q-ghcp-whf7","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://github.com/backstage/backstage/commit/c371f6fe12371de31dca537510e6653e287cdc2e","tags":["x_refsource_MISC","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-55285","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-3x3q-ghcp-whf7"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/55xxx/CVE-2025-55285.json","tags":["advisory"]},{"url":"https://github.com/backstage/backstage","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-55285","title":"@backstage/plugin-scaffolder-backend Template Secret Leakage in Logs in Scaffolder When Using `fetch:template`","description":"@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.","status":"published","published":"2025-08-15T17:10:26.735Z","modified":"2025-08-15T17:49:24.677Z","cvss":[{"version":"3.1","score":2.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:N/A:N","level":"low","assessor":"cna"}],"cwes":["CWE-532"],"updated_at":"2026-11-02T14:32:52.839698Z"}],"euvd":[{"id":"EUVD-2025-25046","description":"@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.","status":"published","published":"2025-08-15T17:10:26Z","modified":"2025-08-15T17:49:24Z","cvss":[{"version":"3.1","score":2.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-02T20:31:56.690534Z"}],"ghsa":[{"id":"GHSA-3x3q-ghcp-whf7","title":"Template Secret leakage in logs in Scaffolder when using `fetch:template`","description":"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.\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)","status":"published","published":"2025-08-15T18:43:16Z","modified":"2025-09-26T17:19:19Z","cvss":[{"version":"3.1","score":2.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-532"],"updated_at":"2026-11-02T14:38:58.965005Z"}],"nvd":[{"id":"CVE-2025-55285","description":"@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.","status":"published","published":"2025-08-15T18:15:27.943Z","modified":"2026-06-17T09:41:35.103Z","cvss":[{"version":"3.1","score":2.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:N/A:N","level":"low","assessor":"secondary"}],"cwes":["CWE-532"],"updated_at":"2026-11-02T14:11:24.730342Z"}],"osv":[{"id":"CVE-2025-55285","title":"@backstage/plugin-scaffolder-backend Template Secret Leakage in Logs in Scaffolder When Using `fetch:template`","description":"@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.","status":"published","published":"2025-08-15T17:10:26.735Z","modified":"2026-10-28T02:31:11.904499802Z","cvss":[{"version":"3.1","score":2.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-532"],"updated_at":"2026-11-02T15:44:50.863921Z"},{"id":"GHSA-3x3q-ghcp-whf7","title":"Template Secret leakage in logs in Scaffolder when using `fetch:template`","description":"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.\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)","status":"published","published":"2025-08-15T18:43:16Z","modified":"2025-09-26T17:19:17Z","cvss":[{"version":"3.1","score":2.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-532"],"updated_at":"2026-11-02T15:46:36.092962Z"}]}}