CVE-2025-62510 is a vulnerability identified in FileRise version 1.4.0, a self-hosted web-based file manager designed for multi-file upload, editing, and batch operations. The flaw is a regression that improperly handles permissions, specifically allowing low-privilege users to infer folder visibility and ownership based on folder names. This weakness arises from insufficient enforcement of access controls, enabling users to see or interact with folders that match their username and, in some cases, access other users' content without proper authorization. The vulnerability is classified under CWE-280 (Improper Handling of Insufficient Permissions or Privileges) and CWE-284 (Improper Access Control). The CVSS 3.1 base score is 8.1 (high), with an attack vector of network (AV:N), low attack complexity (AC:L), requiring low privileges (PR:L), no user interaction (UI:N), unchanged scope (S:U), and high impact on confidentiality and integrity (C:H/I:H), but no impact on availability (A:N). The issue affects only version 1.4.0 and was patched in version 1.5.0 by implementing explicit per-folder ACLs that define owners, read, write, share, and read_own permissions. Additionally, strict server-side checks were introduced for all relevant file operations including listing, reading, writing, sharing, renaming, copying/moving, zipping, and WebDAV access paths. This comprehensive fix ensures that unauthorized users cannot infer or access folders beyond their privileges. No known exploits have been reported in the wild, but the ease of exploitation and high impact make this a critical vulnerability to address promptly.

For European organizations using FileRise version 1.4.0, this vulnerability poses a significant risk of unauthorized data exposure and manipulation. Confidential information stored in user-specific or shared folders could be accessed or modified by low-privilege users, potentially leading to data breaches, privacy violations, and loss of data integrity. This is particularly concerning for sectors handling sensitive personal data under GDPR, such as healthcare, finance, and government institutions. The ability to infer folder ownership and visibility could also facilitate further targeted attacks or lateral movement within the network. While availability is not impacted, the breach of confidentiality and integrity could result in regulatory penalties, reputational damage, and operational disruptions. Organizations relying on FileRise for internal file management must consider the risk of insider threats exploiting this flaw or external attackers gaining low-level access to exploit the vulnerability remotely.

Organizations should immediately upgrade FileRise installations from version 1.4.0 to version 1.5.0 or later, where the vulnerability is fully patched. Beyond patching, administrators should audit existing folder permissions and ACLs to ensure no unauthorized access persists. Implement network segmentation and restrict access to the FileRise management interface to trusted internal networks or VPNs to reduce exposure. Enable detailed logging and monitoring of file access and modification activities to detect suspicious behavior early. Conduct regular permission reviews and enforce the principle of least privilege for all users. If upgrading is temporarily not possible, consider disabling WebDAV access and restricting folder visibility through configuration changes to limit the attack surface. Finally, educate users about the risks of unauthorized access and encourage reporting of anomalous file access patterns.