Threats affecting pkg:github/nixos/nixpkgs

CVE-2025-64766 is a medium-severity vulnerability in NixOS nixpkgs affecting the OnlyOffice document server module. It involves the use of a hard-coded secret to protect the file cache, allowing an attacker who knows a document's revision ID to access that document. The vulnerability affects versions from 22.11 up to but not including 25.05, and unstable versions before 25.11. Exploitation does not require authentication or user interaction but does require knowledge of a valid revision ID, which is considered difficult to obtain. The primary impact is unauthorized read access to documents that users may no longer have permission to access, potentially exposing sensitive information. The issue was fixed in NixOS versions 25.05 and unstable 25.