CVE-2025-52101 is a security vulnerability affecting linjiashop versions up to 0.9, involving incorrect access control related to its JWT (JSON Web Token) authentication mechanism. The vulnerability arises when linjiashop uses the default-generated JWT authentication configuration, which allows an attacker to bypass authentication controls. By exploiting this flaw, an attacker can retrieve encrypted sensitive information, specifically the "password" and "salt" values stored within the system. Once these encrypted credentials are obtained, the attacker can perform brute-force attacks offline to recover the original password. This vulnerability indicates a failure in properly securing authentication tokens and access controls, leading to unauthorized access to sensitive credential data. The lack of a CVSS score suggests that the vulnerability is newly published and has not yet been fully assessed or exploited in the wild. However, the technical details imply a significant risk because authentication bypass combined with credential exposure can lead to further compromise of the system or user accounts. The vulnerability does not specify affected versions beyond "<=0.9," and no patches or known exploits are currently documented. The issue is categorized under incorrect access control, a common and critical security weakness that can undermine the confidentiality and integrity of authentication mechanisms.

For European organizations using linjiashop, this vulnerability could have serious consequences. Unauthorized access to encrypted passwords and salts can lead to credential compromise, enabling attackers to impersonate legitimate users or administrators. This can result in data breaches, unauthorized transactions, or manipulation of e-commerce operations. Given that linjiashop is an e-commerce platform, the exposure of user credentials could also lead to financial fraud, loss of customer trust, and regulatory penalties under GDPR for failing to protect personal data. The ability to bypass authentication means attackers might gain access without any user interaction or prior authentication, increasing the risk of automated or large-scale attacks. The offline brute-force cracking of passwords further extends the attack window, as attackers can attempt to recover passwords at their leisure once the encrypted data is obtained. This vulnerability could also facilitate lateral movement within affected networks if reused credentials or administrative accounts are compromised. Overall, the impact on confidentiality and integrity is high, with potential availability impacts if attackers disrupt services or lock out legitimate users.

To mitigate this vulnerability, European organizations should immediately review their use of linjiashop, especially versions up to 0.9, and avoid using default-generated JWT authentication configurations. Specific recommendations include: 1) Upgrade linjiashop to a version where this vulnerability is patched once available; if no patch exists yet, consider temporary mitigation such as disabling JWT authentication or replacing it with a more secure authentication mechanism. 2) Implement strong, unique salts and passwords with sufficient complexity to resist brute-force attacks, and ensure these are never exposed or accessible via any API or interface. 3) Conduct a thorough audit of access controls and authentication flows to ensure tokens cannot be bypassed or manipulated. 4) Monitor logs for unusual authentication attempts or access patterns that might indicate exploitation attempts. 5) Enforce multi-factor authentication (MFA) on administrative and user accounts to reduce the impact of credential compromise. 6) Educate developers and administrators on secure JWT implementation best practices, including token signing, expiration, and validation. 7) If encrypted passwords and salts have been exposed, require password resets and investigate potential breaches. 8) Employ network segmentation and least privilege principles to limit attacker movement if compromise occurs.