Vulnerability in npm-user-validate (CVE-2020-7754)
Summary
Vulnerability in npm-user-validate (CVE-2020-7754). Risk of unauthorized operations or information disclosure. Exploitable via email. Mitigation: upgrade to 1.0.1 or later.
Original description
The description as published by the source.
npm-user-validate before version 1.0.1 is vulnerable to a Regular Expression Denial of Service (REDos). The regex that validates user emails took exponentially longer to process long input strings beginning with @ characters.
Impact
The issue affects the email function. If you use this function to process arbitrary user input with no character limit the application may be susceptible to Denial of Service.
Patches
The issue is patched in version 1.0.1 by improving the regular expression used and also enforcing a 254 character limit.
Workarounds
Restrict the character length to a reasonable degree before passing a value to .emal(); Also, consider doing a more rigorous sanitizing/validation beforehand.
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-2020-7754 has been found in npm-user-validate.
Attackers can target a specific entry point like email over the network to misuse the product.
Risk of unauthorized operations or information disclosure.
What to do: upgrade npm-user-validate to 1.0.1 or later.
If unsure, ask your IT team or search "npm-user-validate CVE-2020-7754" on the vendor's site.
CVE-2020-7754 (npm-user-validate) — CWE-400
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: email
Patched: 1.0.1 — apply immediately
Workaround: Restrict the character length to a reasonable degree before passing a value to .emal(); Also, consider doing a more rigorous sanitizing/validation beforehand.
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-400) exists in npm-user-validate. Attackers reach the vulnerable code path via email without authentication.
Check the vendor advisory for the affected versions of npm-user-validate. Attack surface: email.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 1.0.1.
Workaround: Restrict the character length to a reasonable degree before passing a value to .emal(); Also, consider doing a more rigorous sanitizing/validation beforehand.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'npm-user-validate' . 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 'npm-user-validate' . | 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
npm-user-validateを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply temporary workaround mitigate
Restrict the character length to a reasonable degree before passing a value to `.emal()`; Also, consider doing a more rigorous sanitizing/validation beforehand.パッチが適用されるまでの応急処置として、Restrict the character length to a reasonable degree before passing a value to
.emal(); Also, consider doing a more rigorous sanitizing/validation beforehand. を実施。回避策の副作用 (機能低下) を確認した上で。 -
3Apply patch patch
Upgrade npm-user-validate to 1.0.1ステージング環境で 1.0.1 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。
-
4Post-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 nvd.nist.gov
- web github.com
- web github.com
- web snyk.io
- web snyk.io