Vulnerability in auth0-js (CVE-2020-5263)
Summary
Vulnerability in auth0-js (CVE-2020-5263). Confidential information can be exposed externally. Mitigation: upgrade to 9.13.2 or later.
Original description
The description as published by the source.
auth0.js (NPM package auth0-js) greater than version 8.0.0 and before version 9.12.3 has a vulnerability. In the case of an (authentication) error, the error object returned by the library contains the original request of the user, which may include the plaintext password the user entered. If the error object is exposed or logged without modification, the application risks password exposure. This is fixed in version 9.12.3
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2020-5263 has been found in auth0-js.
Confidential information can be exposed externally.
What to do: upgrade auth0-js to 9.13.2 or later.
If unsure, ask your IT team or search "auth0-js CVE-2020-5263" on the vendor's site.
CVE-2020-5263 (auth0-js) — CWE-522
Attack vector: remote (network-reachable) / no user interaction
Patched: 9.13.2 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-522) exists in auth0-js.
Check the vendor advisory for the affected versions of auth0-js.
Severity: ?. Confidential information can be exposed externally.
Update to 9.13.2.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'auth0-js' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'auth0-js' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
auth0-jsを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade auth0-js to 9.13.2ステージング環境で 9.13.2 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory github.com
- advisory nvd.nist.gov
- patch github.com