CVE-2021-25833

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A file extension handling issue was found in [server] module of ONLYOFFICE DocumentServer v4.2.0.71-v5.6.0.21. The file extension is controlled by an attacker through the request data and leads to arbitrary file overwriting. Using this vulnerability, a remote attacker can obtain remote code execution on DocumentServer.

Se encontró un problema de manejo de extensiones de archivo en el módulo [server] de ONLYOFFICE DocumentServer versiones v4.2.0.71-v5.6.0.21. La extensión del archivo está controlada por un atacante por medio de los datos de una petición y conlleva a una sobrescritura arbitraria del archivo. Con esta vulnerabilidad, un atacante remoto puede obtener una ejecución de código remota en DocumentServer

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-22 CVE Reserved
2021-03-01 CVE Published
2023-11-15 EPSS Updated
2024-08-03 CVE Updated
2024-08-03 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CAPEC

References (6)

URL	Tag	Source
https://github.com/ONLYOFFICE/server	Product
https://github.com/ONLYOFFICE/server/blob/v5.6.0.21/DocService/sources/converterservice.js#L200	Third Party Advisory
https://github.com/ONLYOFFICE/server/blob/v5.6.0.21/FileConverter/sources/converter.js#L283	Third Party Advisory
https://github.com/ONLYOFFICE/server/blob/v5.6.0.21/FileConverter/sources/converter.js#L593	Third Party Advisory

URL	Date	SRC
https://github.com/merrychap/poc_exploits/tree/master/ONLYOFFICE/CVE-2021-25833	2024-08-03

URL	Date	SRC

URL	Date	SRC
https://github.com/ONLYOFFICE/DocumentServer	2021-03-15

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Onlyoffice Search vendor "Onlyoffice"		Document Server Search vendor "Onlyoffice" for product "Document Server"				>= 4.2.0.71 <= 5.6.0.21 Search vendor "Onlyoffice" for product "Document Server" and version " >= 4.2.0.71 <= 5.6.0.21"		-		Affected