CVE-2021-3199

moderate-risk
Published 2021-01-26

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.

Do I need to act?

~
6.8% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Onlyoffice

References (6)

Release Notes https://github.com/ONLYOFFICE/DocumentServer/blob/903fe5ab7a275bd69c3c3346af2d21...
Exploit https://github.com/moehw/poc_exploits/tree/master/CVE-2021-3199/poc_uploadImageF...
Exploit https://github.com/nola-milkin/poc_exploits/blob/master/CVE-2021-3199/poc_upload...
Release Notes https://github.com/ONLYOFFICE/DocumentServer/blob/903fe5ab7a275bd69c3c3346af2d21...
Exploit https://github.com/moehw/poc_exploits/tree/master/CVE-2021-3199/poc_uploadImageF...
Exploit https://github.com/nola-milkin/poc_exploits/blob/master/CVE-2021-3199/poc_upload...
46
/ 100
moderate-risk
Severity 32/34 · Critical
Exploitability 9/34 · Low
Exposure 5/34 · Minimal