CVE-2021-3199

CRITICAL

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 v3.1 Score

9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Published: 1/26/2021Modified: 10/9/2026

Related Intelligence (0)

No articles currently reference this CVE.

References (7)

https://github.com/ONLYOFFICE/DocumentServer/blob/903fe5ab7a275bd69c3c3346af2d21cf87ebeabf/CHANGELOG.md#563Release NotesThird Party Advisoryhttps://github.com/moehw/poc_exploits/tree/master/CVE-2021-3199/poc_uploadImageFile.pyExploitThird Party Advisoryhttps://github.com/nola-milkin/poc_exploits/blob/master/CVE-2021-3199/poc_uploadImageFile.pyExploitThird Party Advisoryhttps://github.com/ONLYOFFICE/DocumentServer/blob/903fe5ab7a275bd69c3c3346af2d21cf87ebeabf/CHANGELOG.md#563Release NotesThird Party Advisoryhttps://github.com/moehw/poc_exploits/tree/master/CVE-2021-3199/poc_uploadImageFile.pyExploitThird Party Advisoryhttps://github.com/nola-milkin/poc_exploits/blob/master/CVE-2021-3199/poc_uploadImageFile.pyExploitThird Party Advisoryhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-3199US Government Resource