CVE-2021-3199 Information

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.

CVSS Vector

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

Reference

https://github.com/nola-milkin/poc_exploits/blob/master/CVE-2021-3199/poc_uploadImageFile.py https://github.com/ONLYOFFICE/DocumentServer/blob/903fe5ab7a275bd69c3c3346af2d21cf87ebeabf/CHANGELOG.md#563 https://github.com/moehw/poc_exploits/tree/master/CVE-2021-3199/poc_uploadImageFile.py

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8