CVE-2022-41158 is a high-severity remote code execution (RCE) vulnerability affecting the eyoom builder software developed by eyoom Co., Ltd. The root cause of this vulnerability lies in improper limitation of a pathname to a restricted directory (CWE-22), commonly known as a path traversal flaw. Specifically, the vulnerability arises because the application uses cookie values as file path inputs without adequate validation or sanitization. This allows a remote attacker to manipulate cookie data to traverse directories and access or execute unauthorized files on the server. Additionally, the vulnerability is linked to CWE-94, indicating the possibility of code injection through the improper handling of user-supplied input. Exploiting this flaw, an attacker with authenticated access (as indicated by the CVSS vector requiring privileges) can execute arbitrary code remotely, potentially leading to full system compromise. The CVSS v3.1 base score of 7.2 reflects a high severity level, with attack vector being network-based, low attack complexity, but requiring privileges and no user interaction. The scope is unchanged, meaning the impact is confined to the vulnerable component. The vulnerability affects unspecified versions of eyoom builder, and no official patches or exploit instances in the wild have been reported as of the publication date (November 25, 2022). However, the nature of the vulnerability and its potential for remote code execution make it a critical concern for organizations using this software, especially in web-facing environments where cookie manipulation is feasible.

For European organizations utilizing eyoom builder, this vulnerability poses significant risks. Successful exploitation can lead to unauthorized remote code execution, allowing attackers to compromise confidentiality by accessing sensitive data, integrity by modifying or injecting malicious code, and availability by disrupting services or deploying ransomware. Given that exploitation requires authenticated access, insider threats or compromised credentials could be leveraged to initiate attacks. The impact is particularly severe for organizations hosting critical web applications or services on eyoom builder, including sectors such as government, finance, healthcare, and e-commerce, which are prevalent across Europe. The ability to execute arbitrary code remotely can facilitate lateral movement within networks, data exfiltration, and persistent footholds, potentially leading to large-scale breaches. Furthermore, the lack of known patches increases the window of exposure. The vulnerability's exploitation could undermine trust in affected services and lead to regulatory penalties under GDPR if personal data is compromised.

To mitigate CVE-2022-41158, European organizations should implement the following specific measures: 1) Immediately audit all deployments of eyoom builder to identify affected instances, including version verification even if unspecified, and isolate critical systems. 2) Restrict and monitor authenticated user access, enforcing strong authentication mechanisms such as multi-factor authentication (MFA) to reduce the risk of credential compromise. 3) Implement strict input validation and sanitization on all cookie values and user-supplied data, ensuring that path traversal sequences (e.g., '../') are detected and blocked. 4) Employ web application firewalls (WAFs) with custom rules to detect and block suspicious cookie manipulations indicative of path traversal attempts. 5) Conduct regular security assessments and penetration testing focusing on path traversal and code injection vectors within the eyoom builder environment. 6) Monitor logs for unusual file access patterns or code execution anomalies. 7) Engage with eyoom Co., Ltd. for updates or patches and apply them promptly once available. 8) As a temporary workaround, consider restricting file system permissions for the web server process to limit the impact of potential exploitation. 9) Educate developers and administrators about secure coding practices related to file path handling and cookie management to prevent similar vulnerabilities in customizations or future versions.