---
title: "Security digest: January 22, 2021"
url: https://erroneo.us/security/2021-01-22/
description: "January 22, 2021 vulnerability digest: 1 brief (ONLYOFFICE Docs CVE-2021-3199: Old Upload RCE…). What to patch and who can relax."
type: security-digest-day
section: "Security Digest"
date_published: 2021-01-22
date_modified: 2026-10-08
publisher: erroneo.us
author: erroneo.us Security Desk
license: All rights reserved. Quote with attribution and a link.
---

# Security digest: January 22, 2021

1 editorial brief.

## Take stock

- Check exposure: ONLYOFFICE Docs CVE-2021-3199: Old Upload RCE Now in KEV . Anyone self-hosting ONLYOFFICE Document Server (Docs) 5.6.2 or older, alone or behind Nextcloud, ownCloud, Seafile, Confluence, Moodle or another connector, especially internet-reachable instances with JWT enabled.
- None of it touches your stack? Then there is nothing to do today. That is a result, not a failure to read carefully.

## Editorial briefs

- **Check exposure** [ONLYOFFICE Docs CVE-2021-3199: Old Upload RCE Now in KEV](https://erroneo.us/security/briefs/onlyoffice-document-server-path-traversal-cve-2021-3199/index.md): Only Document Server installs older than 5.6.3, a release from August 2020, are at risk, but any you find should be treated as exposed and upgraded or pulled offline today.

## Known exploited (CISA KEV)

None.

## Critical advisories

None.

---
Source page: https://erroneo.us/security/2021-01-22/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt