CVE-2025-44017 is a medium-severity vulnerability affecting the "Gunosy" App for Android versions prior to 7.34.0, developed by Gunosy Inc. The vulnerability arises from the application's improper handling of sensitive information during outbound communication. Specifically, when a user accesses a crafted URL, the app may inadvertently include sensitive data—namely the JSON Web Token (JWT)—in the data sent out. JWTs are commonly used for authentication and authorization, containing claims that validate a user's identity and permissions. Exposure of a JWT to an attacker can allow unauthorized access to user accounts or services that rely on the token for session management. The vulnerability does not require prior authentication (PR:N) but does require user interaction (UI:R), meaning an attacker must trick the user into accessing a maliciously crafted URL. The attack vector is network-based (AV:N), and the vulnerability impacts confidentiality (C:L) but not integrity or availability. No known exploits are currently reported in the wild. The vulnerability was published on September 2, 2025, and is tracked under CVE-2025-44017. The CVSS v3.0 base score is 4.3, reflecting a medium risk primarily due to the need for user interaction and limited impact scope. The flaw could allow attackers to intercept or steal JWTs, potentially leading to session hijacking or unauthorized access to user data within the Gunosy app ecosystem. Since the vulnerability is tied to crafted URLs, phishing or social engineering campaigns could be used to exploit it.

For European organizations, the impact of CVE-2025-44017 depends largely on the prevalence of the Gunosy app among their employees or customers. If the app is used for news aggregation or content delivery within corporate environments, exposure of JWTs could lead to unauthorized access to user accounts, potentially leaking personal or organizational data. Although the vulnerability does not directly affect enterprise systems, compromised user tokens could be leveraged for lateral movement or social engineering attacks within organizations. Additionally, if the app is used in sectors handling sensitive information (e.g., media, communications, or marketing firms), the risk of data leakage increases. The medium severity and requirement for user interaction somewhat limit the threat, but targeted phishing campaigns exploiting this vulnerability could still pose a risk. Furthermore, GDPR considerations mean that any unauthorized access or data leakage involving European users could result in regulatory scrutiny and fines. Organizations should be aware of this vulnerability to prevent potential reputational damage and ensure compliance with data protection regulations.

1. Update the Gunosy app to version 7.34.0 or later, where the vulnerability has been addressed. 2. Educate users about the risks of clicking on untrusted or suspicious URLs, emphasizing caution with links received via email, messaging apps, or social media. 3. Implement network-level protections such as URL filtering and anti-phishing solutions to block access to known malicious or suspicious URLs that could exploit this vulnerability. 4. Monitor network traffic for unusual outbound requests from mobile devices that may indicate leakage of sensitive tokens. 5. Encourage the use of multi-factor authentication (MFA) for services accessed via the Gunosy app or related accounts to reduce the impact of stolen JWTs. 6. For organizations managing mobile devices, deploy Mobile Device Management (MDM) solutions to enforce app updates and restrict installation of untrusted applications. 7. Conduct regular security awareness training focusing on social engineering and phishing threats that could exploit this vulnerability. 8. Review and audit token lifetimes and revocation mechanisms within the app's backend to minimize the window of opportunity for attackers if tokens are compromised.