CVE-2024-54125

Improper authorization in handler for custom URL scheme issue in Shonen Jump+ App for Android versions prior to 4.0.0 allows an attacker to lead a user to access an arbitrary website via the vulnerable App. As a result, the user may become a victim of a phishing attack.

Weakness

The product uses a handler for a custom URL scheme, but it does not properly restrict which actors can invoke the handler using the scheme.

Potential Mitigations

• Utilize a user prompt pop-up to authorize potentially harmful actions such as those modifying data or dealing with sensitive information.
• When designing functionality of actions in the URL scheme, consider whether the action should be accessible to all mobile applications, or if an allowlist of applications to interface with is appropriate.

References

• https://jvn.jp/en/jp/JVN08430039/
• https://shonenjumpplus.com/article/info20241216