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ONLYOFFICE Docs Color Theme Name XSS Vulnerability

Vulnerability

A cross-site scripting (XSS) vulnerability has been identified in ONLYOFFICE Docs versions prior to 9.2.1. The issue arises in the Document Server component, where the Color theme name can be manipulated to inject malicious JavaScript code.

Impact

Exploitation of this vulnerability allows for cross-site scripting, where an attacker can inject malicious scripts that are executed in the context of the user's browser.

Remediation

Users can update to ONLYOFFICE Docs version 9.2.1 or later, where this vulnerability has been fixed.

Added: Dec 25, 2025, 8:17 PM
Updated: Dec 25, 2025, 8:17 PM

Vulnerability Rating

Custom Algorithm
spread
5.2
impact
1.7
exploitability
5.2
remediation
8.3
relevance
1.6
threat
0.0
urgency
2.9
incentive
1.7

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.