Directory Traversal Vulnerability in ONLYOFFICE Document Server
CVE-2021-3199

9.8CRITICAL

Key Information:

Vendor

Onlyoffice

Status
Document Server
Vendor
CVE Published:
22 January 2021

What is CVE-2021-3199?

A directory traversal vulnerability affects ONLYOFFICE Document Server versions before 5.6.3. This flaw allows an attacker to execute remote code by manipulating the upload process through a '/..' sequence in an image upload parameter when using JWT (JSON Web Token) for authentication. Successful exploitation can compromise the security of the host, enabling unauthorized access to sensitive files or system commands.

References

https://github.com/ONLYOFFICE/DocumentServer/blob/903fe5a...
x_refsource_CONFIRM
https://github.com/nola-milkin/poc_exploits/blob/master/C...
x_refsource_MISC
https://github.com/moehw/poc_exploits/tree/master/CVE-202...
x_refsource_MISC

EPSS Score

6% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2021-3199 : Directory Traversal Vulnerability in ONLYOFFICE Document Server