CVE-2025-66208

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/CollaboraOnline/online/security/advisories/GHSA-j3q6-q5pc-v5wf	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:collabora:online:*:*:*:*:*:*:*:*

History

08 Dec 2025, 19:37

Type	Values Removed	Values Added
First Time		Collabora Collabora online
References	~~() https://github.com/CollaboraOnline/online/security/advisories/GHSA-j3q6-q5pc-v5wf -~~	() https://github.com/CollaboraOnline/online/security/advisories/GHSA-j3q6-q5pc-v5wf - Patch, Vendor Advisory
CPE		cpe:2.3:a:collabora:online::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.8

03 Dec 2025, 19:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-12-03 19:15

Updated : 2025-12-08 19:37

NVD link : CVE-2025-66208

Mitre link : CVE-2025-66208

CVE.ORG link : CVE-2025-66208

JSON object : View

Products Affected

collabora

online

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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