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CVE-2025-66645
Path Traversal in nicegui (CVE-2025-66645)
Summary
path traversal in nicegui (CVE-2025-66645). Confidential information can be exposed externally. Exploitable via ``poc.py``. Mitigation: upgrade to `3.4.0` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2025-66645** has been found in nicegui.
Attackers can target a specific entry point like ``poc.py`` over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: ?/10.
What to do: upgrade nicegui to **3.4.0** or later.
If unsure, ask your IT team or search "nicegui CVE-2025-66645" on the vendor's site.
CVE-2025-66645 (nicegui) — CWE-22 /
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: `poc.py`
Patched: `3.4.0` — 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
**Path traversal** (CWE-22) exists in nicegui. Attackers reach the vulnerable code path via ``poc.py`` without authentication.
📍 Affected scope
nicegui — . Attack surface: `poc.py`.
🔥 Severity
Severity: ?. Confidential information can be exposed externally
🔧 How to fix
Update to **3.4.0**.
🛡️ 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 'nicegui' .` 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 'nicegui' . | 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 `nicegui` 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 nicegui to 3.4.0ステージング環境で 3.4.0 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
nicegui
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.0"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2025-66645
- advisory https://github.com/advisories/GHSA-hxp3-63hc-5366
- package https://github.com/zauberzeug/nicegui
- package https://pypi.org/project/nicegui
- web https://github.com/zauberzeug/nicegui/security/advisories/GHSA-hxp3-63hc-5366
- web https://github.com/zauberzeug/nicegui/commit/a1b89e2a24e1911a40389ace2153a37f4eea92a9