CVE-2025-15151 affects TaleLin Lin-CMS versions 0.1 through 0.6.0 and involves the improper storage of passwords within the configuration file located at /tests/config.py in the Tests Folder component. The vulnerability arises from insecure handling of username and password arguments, leading to the presence of plaintext or otherwise exposed passwords in configuration files. This exposure can be exploited remotely without authentication or user interaction, though the attack complexity is high, indicating that exploitation requires significant effort or specialized knowledge. The vulnerability primarily compromises confidentiality by potentially allowing attackers to retrieve sensitive credentials, which could lead to unauthorized access to the CMS or associated systems. The CVSS 4.0 score is 6.3 (medium severity), reflecting network attack vector, high attack complexity, no privileges or user interaction required, and limited impact confined to confidentiality. No patches or fixes are currently linked, and while the exploit has been publicly disclosed, there are no known active exploits in the wild. The vulnerability is located in a test configuration file, which may or may not be present or accessible in production deployments, but if accessible, it poses a significant risk of credential leakage.

For European organizations using TaleLin Lin-CMS, this vulnerability could lead to unauthorized disclosure of passwords stored in configuration files, potentially enabling attackers to gain access to CMS administrative functions or backend systems. This could result in data breaches, defacement, or further lateral movement within the network. The impact is primarily on confidentiality, with no direct effect on system integrity or availability. Organizations that deploy Lin-CMS in production environments without removing or securing test configuration files are at higher risk. Given the remote attack vector and no requirement for authentication, attackers could exploit this vulnerability from outside the network perimeter. The medium severity rating suggests a moderate risk, but the high attack complexity may reduce the likelihood of widespread exploitation. However, once credentials are compromised, the consequences could be severe, especially for organizations managing sensitive content or personal data under GDPR regulations.

European organizations should immediately audit their Lin-CMS installations to identify the presence of the /tests/config.py file or any configuration files containing plaintext passwords. If found, these files should be removed from production environments or secured with strict access controls. Organizations should upgrade to a patched version of Lin-CMS once available or apply vendor-provided fixes. In the absence of patches, consider implementing network-level restrictions to limit remote access to the CMS and associated configuration files. Employ file integrity monitoring to detect unauthorized changes or presence of sensitive files. Additionally, enforce strong credential policies and rotate any passwords that may have been exposed. Regularly review and harden CMS configurations, disable or remove test components in production, and monitor logs for suspicious access attempts targeting configuration files. Finally, educate development and deployment teams about the risks of including sensitive information in test or configuration files.