CVE-2021-43448: ONLYOFFICE Server

Medium severity, CVSS 5.3. EPSS: 1% chance of exploitation in the next 30 days.

ONLYOFFICE all versions as of 2021-11-08 is vulnerable to Improper Input Validation. A lack of input validation can allow an attacker to spoof the names of users who interact with a document, if the document id is known.

Affected products

• ONLYOFFICE Server: up to and including 7.0.0.49

Published 2023-01-23. Last modified 2026-06-17.