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CVE-2024-1681
Vulnerability in flask-cors (CVE-2024-1681)
Summary
vulnerability in flask-cors (CVE-2024-1681). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `4.0.1` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2024-1681** has been found in flask-cors.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade flask-cors to **4.0.1** or later.
If unsure, ask your IT team or search "flask-cors CVE-2024-1681" on the vendor's site.
CVE-2024-1681 (flask-cors) — CWE-117 /
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: `4.0.1` — 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.
❓ What is the problem
**A vulnerability** (CWE-117) exists in flask-cors.
📍 Affected scope
flask-cors — .
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **4.0.1**.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'flask-cors' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'flask-cors' . | 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 `flask-cors` を grep し、稼働しているサービス・バージョンを把握する。
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6Apply patch patch
Upgrade flask-cors to 4.0.1ステージング環境で 4.0.1 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と、Step 3 で見つけた異常検知の続報チェックを含めること。
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7Post-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 Step 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
PyPI
flask-cors
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"4.0.0"}]}]
pip
flask-cors
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.1"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2024-1681
- advisory https://github.com/advisories/GHSA-84pr-m4jr-85g5
- package https://github.com/corydolphin/flask-cors
- report https://huntr.com/bounties/25a7a0ba-9fa2-4777-acb6-03e5539bb644
- web https://github.com/corydolphin/flask-cors/blob/40acc8092332dfed4bb54d7a4f89a6d479466de7/flask_cors/extension.py#L194
- web https://lists.debian.org/debian-lts-announce/2025/05/msg00049.html
- web https://github.com/pypa/advisory-database/tree/main/vulns/flask-cors/PYSEC-2024-271.yaml