CVE-2024-55075 in Grocy
Summary
by MITRE • 01/06/2025
Grocy through 4.3.0 allows remote attackers to obtain sensitive information via direct requests to pages that are not shown in the UI, such as calendar and recipes.
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Analysis
by VulDB Data Team • 09/30/2025
The vulnerability identified as CVE-2024-55075 affects Grocy versions through 4.3.0 and represents a significant information disclosure flaw that exposes sensitive data through unauthorized direct access to application components. This vulnerability stems from insufficient access controls within the application's architecture, allowing remote attackers to bypass the standard user interface and directly request pages that are typically hidden from normal user interaction. The affected components include calendar and recipes functionality, which contain potentially sensitive information that should remain protected from unauthorized access.
The technical implementation of this vulnerability involves the application's failure to properly validate and authenticate requests to internal pages that are not part of the standard navigation flow. When attackers make direct HTTP requests to specific endpoints corresponding to calendar and recipes functionality, the application fails to enforce proper authorization checks, thereby allowing access to data that would normally be restricted. This represents a classic case of improper access control where the application's security boundaries are not properly enforced for non-standard access paths. The vulnerability aligns with CWE-284 which specifically addresses improper access control issues, and can be categorized under ATT&CK technique T1213.001 for data from information repositories, as it enables unauthorized access to stored information.
The operational impact of this vulnerability extends beyond simple information disclosure, as calendar and recipes data may contain sensitive personal information, user preferences, dietary restrictions, and potentially confidential scheduling details that could be exploited for social engineering attacks or identity theft. The exposure of such data creates opportunities for attackers to gather intelligence about users' habits, routines, and personal preferences, which could be leveraged for more sophisticated attacks. The vulnerability affects any remote attacker with network access to the affected system, making it particularly dangerous as it does not require physical access or complex exploitation techniques. Organizations using Grocy applications may face compliance violations under data protection regulations such as gdpr and ccpa if sensitive user information is disclosed through this vulnerability.
Mitigation strategies should focus on implementing comprehensive access control measures across all application endpoints, regardless of their visibility in the standard user interface. The primary recommendation involves enforcing strict authentication and authorization checks for all application paths, ensuring that every request is validated against proper user permissions before data is returned. Organizations should implement proper input validation and access control mechanisms that prevent direct access to internal application components. Additionally, regular security audits should be conducted to identify and remediate similar access control flaws in application architecture. The vulnerability demonstrates the importance of defense in depth principles where multiple layers of security controls work together to prevent unauthorized access to sensitive information, and represents a critical reminder that all application endpoints must be secured regardless of their apparent visibility to end users.