CVE-2025-55523 is a directory traversal vulnerability identified in the component /api/download_work_dir_file.py of Agent-Zero version 0.8.*. Directory traversal vulnerabilities allow an attacker to manipulate file path inputs to access files and directories outside the intended scope of the application. In this case, the vulnerable endpoint likely fails to properly sanitize or validate user-supplied input that specifies which file to download from the working directory. This flaw enables an attacker to craft specially designed requests that traverse the directory structure (e.g., using '../' sequences) to access arbitrary files on the server's filesystem. Such unauthorized access can lead to disclosure of sensitive information, including configuration files, credentials, or other critical data stored on the host. Although no known exploits are currently reported in the wild, the vulnerability is publicly disclosed and could be weaponized by attackers once exploit code becomes available. The absence of a CVSS score suggests the vulnerability is newly published and not yet fully assessed. The lack of patch links indicates that a fix may not be available at this time, increasing the urgency for organizations using Agent-Zero v0.8.* to implement mitigations or consider upgrading once a patch is released. Given the nature of directory traversal, the vulnerability primarily impacts confidentiality but could also affect integrity if attackers use accessed files to further compromise the system. Exploitation does not appear to require authentication or user interaction, increasing the risk profile. The vulnerability affects a specific version of Agent-Zero, a tool whose deployment footprint and criticality will influence the overall risk.

For European organizations, the impact of CVE-2025-55523 depends on the extent to which Agent-Zero v0.8.* is deployed within their environments. If used in critical infrastructure, government agencies, or enterprises handling sensitive data, unauthorized file access could lead to exposure of confidential information, intellectual property, or personal data protected under GDPR. This could result in regulatory penalties, reputational damage, and operational disruptions. Attackers could leverage the vulnerability to obtain configuration files or credentials, facilitating further lateral movement or privilege escalation within networks. The ease of exploitation without authentication raises the threat level, especially for externally accessible instances of Agent-Zero. Organizations in sectors such as finance, healthcare, and public administration in Europe are particularly sensitive to data breaches and may face severe consequences if exploited. Additionally, the lack of a patch means organizations must rely on compensating controls to reduce risk until a fix is available.

1. Immediate mitigation should include restricting access to the vulnerable /api/download_work_dir_file.py endpoint via network controls such as firewalls or web application firewalls (WAFs) to limit exposure to trusted IP addresses only. 2. Implement strict input validation and sanitization on any parameters that specify file paths to prevent directory traversal sequences. 3. Monitor logs for suspicious requests containing directory traversal patterns (e.g., '../') targeting the download endpoint. 4. If possible, disable or remove the vulnerable component or service until a patch is released. 5. Employ the principle of least privilege on the file system and application level, ensuring the Agent-Zero process runs with minimal permissions to limit file access scope. 6. Keep abreast of official patches or updates from the Agent-Zero maintainers and apply them promptly once available. 7. Conduct internal audits to identify any unauthorized access or data exfiltration attempts related to this vulnerability. 8. Educate security teams about this vulnerability to ensure rapid detection and response capabilities.