CVE-2021-3199

CriticalCVSS 9.8/10Known exploited (CISA KEV)Last modified Oct 9, 2026

Description

Directory traversal with remote code execution can occur in /upload in ONLYOFFICE Document Server before 5.6.3, when JWT is used, via a /.. sequence in an image upload parameter.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-22

Affected software

No affected versions have been published.

Timeline

Published: Jan 26, 2021
Last modified: Oct 9, 2026
Added to CISA KEV: Oct 8, 2026
NVD status: Analyzed

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