CVE-2025-63371 is a directory traversal vulnerability identified in OneCommander version 3.102.0.0, a file management application. The vulnerability resides in the ZIP file processing component responsible for extracting and handling ZIP archive contents. Specifically, the flaw allows crafted ZIP files containing directory traversal sequences (e.g., '../') to escape the intended extraction directory. This can lead to arbitrary file writes outside the designated folder, potentially overwriting sensitive system or application files. The vulnerability is exploitable remotely without authentication or user interaction, as the attacker only needs to supply a malicious ZIP archive to the vulnerable component. The CVSS v3.1 score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N) indicates a high-severity issue with a significant impact on confidentiality but no impact on integrity or availability. Although no public exploits have been reported yet, the ease of exploitation and potential for data exposure make this a critical concern. The vulnerability is categorized under CWE-22 (Improper Limitation of a Pathname to a Restricted Directory), a common weakness that can lead to unauthorized file system access. No patches or fixes have been linked yet, so organizations must monitor vendor advisories closely. The vulnerability's exploitation could allow attackers to read or exfiltrate sensitive information by overwriting or placing files in unauthorized locations, posing a serious risk to data confidentiality.

For European organizations, the primary impact of CVE-2025-63371 is the potential unauthorized disclosure of sensitive data due to directory traversal during ZIP extraction. Attackers could overwrite configuration files or place malicious files in critical directories, leading to data leakage or further compromise. This is particularly concerning for industries handling sensitive personal data, intellectual property, or critical infrastructure information, such as finance, healthcare, and manufacturing sectors prevalent in Europe. The vulnerability's network-exploitable nature means attackers can target exposed services or users processing untrusted ZIP files remotely, increasing the attack surface. Confidentiality breaches could lead to regulatory penalties under GDPR and damage to organizational reputation. While integrity and availability are not directly impacted, the ability to write files arbitrarily could be leveraged in multi-stage attacks. The absence of known exploits currently provides a window for proactive mitigation, but the high CVSS score underscores the urgency for European entities to address this vulnerability promptly.

To mitigate CVE-2025-63371, European organizations using OneCommander should implement the following specific measures: 1) Immediately restrict or monitor the use of OneCommander for processing ZIP files from untrusted sources until a patch is available. 2) Employ application whitelisting and sandboxing to limit the file system locations accessible to OneCommander, preventing unauthorized file writes outside designated directories. 3) Use network-level controls such as firewalls and intrusion detection systems to detect and block suspicious ZIP file transfers or extraction attempts. 4) Implement file integrity monitoring on critical directories to detect unauthorized changes potentially caused by exploitation. 5) Educate users about the risks of opening ZIP files from unknown or untrusted sources, emphasizing caution in file handling. 6) Monitor vendor communications for patches or updates addressing this vulnerability and apply them promptly once released. 7) Consider alternative file management tools with secure ZIP handling if immediate patching is not feasible. These targeted actions go beyond generic advice by focusing on controlling ZIP file processing behavior and limiting the attack surface specific to this vulnerability.