CVE-2025-64766: Hardcoded Credentials (CVSS 5.3)

Description

NixOS's Onlyoffice is a software suite that offers online and offline tools for document editing, collaboration, and management. In versions from 22.11 to before 25.05 and versions before Unstable 25.11, a hard-coded secret was used in the NixOS module for the OnlyOffice document server to protect its file cache. An attacker with knowledge of an existing revision ID could use this secret to obtain a document. In practice, an arbitrary revision ID should be hard to obtain. The primary impact is likely the access to known documents from users with expired access. This issue was resolved in NixOS unstable version 25.11 and version 25.05.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness Type (CWE)

CWE-798 CWE-798

References

Other References

https://github.com/NixOS/nixpkgs/commit/8e74d05e3de4ee5ad320cd585a7e0f12a4730869 https://github.com/NixOS/nixpkgs/commit/cec38dec00df26a901eb8b424d53bbb3bcc72eec https://github.com/NixOS/nixpkgs/pull/462100 https://github.com/NixOS/nixpkgs/pull/462204 https://github.com/NixOS/nixpkgs/security/advisories/GHSA-58m4-5wg3-5g5v

Frequently Asked Questions

What is CVE-2025-64766? +

NixOS's Onlyoffice is a software suite that offers online and offline tools for document editing, collaboration, and management. In versions from 22.11 to before 25.05 and versions before Unstable 25.11, a hard-coded secret was used in the NixOS module for the OnlyOffice document server to protect its file cache. An attacker with knowledge of an existing revision ID could use this secret to obtain a document. In practice, an arbitrary revision ID should be hard to obtain. The primary impact is likely the access to known documents from users with expired access. This issue was resolved in NixOS unstable version 25.11 and version 25.05. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-64766? +

CVE-2025-64766 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2025-64766? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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