CVE-2021-43444: ONLYOFFICE Server

High severity, CVSS 7.5. EPSS: 1.2% chance of exploitation in the next 30 days.

ONLYOFFICE all versions as of 2021-11-08 is affected by Incorrect Access Control. Signed document download URLs can be forged due to a weak default URL signing key.

Affected products

• ONLYOFFICE Server: up to and including 7.0.0.49

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