CVE-2020-11535

Published: Apr 15, 2020Modified: Jun 17, 2026

9.8

Vector

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

Exploitability: 3.9 / Impact: 5.9

Source: NVD

Description

An issue was discovered in ONLYOFFICE Document Server 5.5.0. An attacker can craft a malicious .docx file, and exploit XML injection to enter an attacker-controlled parameter into the x2t binary, to rewrite this binary and/or libxcb.so.1, and execute code on a victim's server.

Affected (1)

Products: Onlyoffice: Document Server

1 product

Document Server

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Onlyoffice Document Server	Version 5.5.0

Related CWEs

XML Injection (aka Blind XPath Injection)

The product does not properly neutralize special elements that are used in XML, allowing attackers to modify the syntax, content, or commands of the XML before it is processed by an end system.

References (4)

https://gist.github.com/andrewaeva/beb92d3d2f1c5672dbda5050e323f6a0

Source: cve@mitre.org

Third Party Advisory

https://github.com/ONLYOFFICE/DocumentServer/blob/master/CHANGELOG.md#551

Source: cve@mitre.org

Release NotesThird Party Advisory

https://gist.github.com/andrewaeva/beb92d3d2f1c5672dbda5050e323f6a0

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://github.com/ONLYOFFICE/DocumentServer/blob/master/CHANGELOG.md#551

Source: af854a3a-2127-422b-91ae-364da2661108

Release NotesThird Party Advisory

Timeline

No history available yet.