CVE-2025-13246 identifies a path traversal vulnerability within the JwtAuthenticationFilter function of the shsuishang ShopSuite ModulithShop software, specifically in the file JwtAuthenticationFilter.java. This vulnerability allows remote attackers to manipulate file path inputs, bypassing intended access controls to read arbitrary files on the server. The flaw stems from insufficient validation or sanitization of path parameters handled during JWT authentication filtering, enabling traversal sequences (e.g., '../') to access files outside the designated directories. The product follows a rolling release model, which means it continuously delivers updates without traditional versioning, complicating patch management and vulnerability tracking. The vulnerability has a CVSS 4.0 base score of 5.3, indicating medium severity: it can be exploited remotely over the network without user interaction and requires only low privileges, but the impact on confidentiality, integrity, and availability is limited to low. Although no active exploitation in the wild has been confirmed, public exploit code is available, increasing the risk of opportunistic attacks. The lack of patch links suggests that either fixes are not yet publicly released or are integrated into ongoing updates without clear version identifiers. This vulnerability primarily threatens confidentiality by exposing sensitive files and could also affect integrity and availability if critical configuration or system files are accessed or manipulated. Given the nature of the product—a modular e-commerce platform—successful exploitation could lead to leakage of customer data, credentials, or internal system information, potentially facilitating further attacks.

For European organizations using the ShopSuite ModulithShop platform, this vulnerability poses a tangible risk of unauthorized data disclosure and potential service disruption. Attackers exploiting the path traversal flaw could access sensitive files such as configuration files, authentication tokens, or customer data stored on the server, undermining confidentiality. This could lead to compliance violations under GDPR due to exposure of personal data. Integrity might be compromised if attackers modify files or configurations, potentially enabling persistent backdoors or manipulation of business logic. Availability impacts are less direct but possible if critical system files are targeted, causing application failures or downtime. The medium CVSS score reflects moderate risk; however, the availability of public exploits increases the likelihood of exploitation attempts. European e-commerce businesses relying on this platform may face reputational damage, financial losses, and regulatory penalties if the vulnerability is exploited. The rolling release model complicates patch management, increasing the window of exposure. Organizations with limited security monitoring or outdated deployment practices are particularly vulnerable.

To mitigate CVE-2025-13246, organizations should implement the following specific measures: 1) Conduct immediate code review and audit of the JwtAuthenticationFilter to ensure strict validation and sanitization of all path inputs, explicitly disallowing traversal sequences such as '../'. 2) Employ application-level whitelisting of accessible file paths to restrict file access strictly to intended directories. 3) Utilize runtime application self-protection (RASP) or web application firewalls (WAF) configured to detect and block path traversal patterns in HTTP requests targeting the authentication filter endpoints. 4) Monitor logs for anomalous access patterns or attempts to exploit path traversal, focusing on requests containing suspicious path characters or sequences. 5) Engage with the vendor or community to obtain the latest rolling release updates that may address this vulnerability and apply them promptly. 6) Isolate the application environment with least privilege principles, limiting file system permissions to minimize potential damage from unauthorized file access. 7) Implement network segmentation to restrict external access to administrative or sensitive endpoints. 8) Conduct penetration testing focused on path traversal vectors to verify the effectiveness of mitigations. These steps go beyond generic advice by focusing on the specific vulnerable component and the product’s continuous delivery model.