CVE-2025-53893: 
Wolfi vulnerability analysis and mitigation

A Denial of Service (DoS) vulnerability (CVE-2025-53893) was discovered in FileBrowser version 2.38.0. The vulnerability exists in the file processing logic when reading a file on endpoint Filebrowser-Server-IP:PORT/files/{file-name}. The issue was disclosed on July 15, 2025, affecting the FileBrowser application which provides a file managing interface within a specified directory and can be used to upload, delete, preview, rename, and edit files (GitHub Advisory, NVD).

The vulnerability stems from improper resource management in the file processing logic. While the server correctly handles and stores uploaded files, it attempts to load the entire content into memory during read operations without size checks or resource limits. The issue is caused by several factors including lack of memory-safe streaming, absence of validation or size limits during the read phase, and possibly synchronous or blocking file parsing without protection. The vulnerability has been assigned a CVSS v4.0 score of 7.7 (HIGH) with the vector string CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P (GitHub Advisory).

When exploited, this vulnerability allows an authenticated user to upload a large file and trigger uncontrolled memory consumption on read, potentially crashing the server and making it unresponsive. The impact is primarily focused on service availability, as the server remains unresponsive until the entire file loads, which can take a considerable amount of time (GitHub Advisory).

As of the time of publication, no known patches are available for this vulnerability. No official workarounds have been published by the vendor (NVD).