CVE-2025-62509 identifies a critical business logic vulnerability in FileRise, a self-hosted web-based file manager that supports multi-file upload, editing, and batch operations. Prior to version 1.4.0, FileRise improperly handled permissions by inferring file and folder ownership from folder names, such as naming folders after usernames, without enforcing robust server-side authorization checks. This design flaw led to an Insecure Direct Object Reference (IDOR) vulnerability, where low-privilege users could manipulate files belonging to other users by exploiting predictable folder naming conventions. Specifically, attackers could view, delete, or modify files they did not own, violating confidentiality and integrity principles. The vulnerability does not require user interaction and can be exploited remotely over the network with low attack complexity, given that only low privileges are needed. The issue was addressed in FileRise version 1.4.0 by implementing proper server-side ownership verification and further strengthened in version 1.5.0. Until patched, organizations using vulnerable versions face risks of unauthorized data access and manipulation. Workarounds include restricting non-admin users to read-only access or disabling delete and rename APIs on the server side, avoiding the creation of top-level folders named after usernames, and adding explicit server-side checks to verify ownership before allowing file operations such as delete, rename, or move. No known exploits are currently reported in the wild, but the vulnerability’s nature and high CVSS score indicate a significant risk if weaponized.

For European organizations, the impact of CVE-2025-62509 can be substantial, particularly for those relying on FileRise for internal file management and collaboration. Unauthorized access to files can lead to data breaches, exposing sensitive or confidential information, which may violate GDPR and other data protection regulations, resulting in legal and financial penalties. The ability to delete or modify files owned by other users threatens data integrity and can disrupt business operations, especially if critical documents are altered or removed. This vulnerability undermines trust in internal file sharing systems and may facilitate insider threats or lateral movement by malicious actors. SMEs and enterprises using self-hosted solutions without rigorous access controls are particularly vulnerable. The lack of user interaction and low complexity of exploitation increase the likelihood of automated attacks or insider misuse. Additionally, compromised file integrity can affect audit trails and compliance reporting, further complicating incident response and recovery efforts.

European organizations should immediately upgrade FileRise installations to version 1.4.0 or later, with version 1.5.0 recommended for enhanced security. Until upgrades are applied, implement strict access controls by restricting non-admin users to read-only permissions and disabling delete, rename, and move APIs server-side for these users. Avoid using folder names that directly correspond to usernames or other predictable identifiers to reduce the risk of IDOR exploitation. Implement server-side authorization checks that explicitly verify file and folder ownership before permitting any modification or deletion operations. Conduct thorough audits of existing file permissions and folder structures to identify and remediate potential exposure. Employ monitoring and alerting on file operation endpoints to detect unusual activity indicative of exploitation attempts. Educate administrators and users about the risks of this vulnerability and enforce policies to minimize privilege escalation. Finally, integrate this vulnerability into vulnerability management and patching workflows to ensure timely updates and continuous security posture improvement.