CVE-2025-66208
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-03

Last updated on: 2025-12-08

Assigner: GitHub, Inc.

Description
Collabora Online - Built-in CODE Server (richdocumentscode) provides a built-in server with all of the document editing features of Collabora Online. In versions prior to 25.04.702, Collabora Online has a Configuration-Dependent RCE (OS Command Injection) in richdocumentscode proxy. Users of Nextcloud with Collabora Online - Built-in CODE Server app can be vulnerable to attack via proxy.php and an intermediate reverse proxy. This vulnerability is fixed in 25.04.702.
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Meta Information
Published
2025-12-03
Last Modified
2025-12-08
Generated
2026-06-16
AI Q&A
2025-12-03
EPSS Evaluated
2026-06-14
NVD
CVE-2025-66208
EUVD
EUVD-2025-201097
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
collabora online to 25.04.702 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
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Executive Summary

This vulnerability is a Configuration-Dependent Remote Code Execution (RCE) due to OS Command Injection in the richdocumentscode proxy of Collabora Online - Built-in CODE Server. It affects versions prior to 25.04.702 and can be exploited via proxy.php and an intermediate reverse proxy, allowing attackers to execute arbitrary commands on the server.

Impact Analysis

If exploited, this vulnerability can allow an attacker to execute arbitrary operating system commands on the server running Collabora Online, potentially leading to full system compromise, data theft, service disruption, or further attacks within the network.

Mitigation Strategies

To mitigate this vulnerability, update Collabora Online - Built-in CODE Server to version 25.04.702 or later, as this version contains the fix for the Configuration-Dependent RCE in the richdocumentscode proxy. Additionally, review and secure any reverse proxy configurations that interact with proxy.php to reduce exposure.

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