Vulnerability record · CVE-2025-66208 · published 3 December 2025

CVE-2025-66208: Collabora online os command injection vulnerability

Collabora · Online

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.

7.2 CVSS 4.0 High EPSS 1.1% · top 36.1% CWE-78 · OS command injection

7.2CVSS 4.0 base score

1.1%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

1References

17 Jun 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Online Collabora

References

Link	Tags
https://github.com/CollaboraOnline/online/security/advisories/GHSA-j3q6-q5pc-v5wf	PatchVendor Advisory

Track CVE-2025-66208 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2021-32744Collabora online insecure direct object reference vulnerabilityCollabora Online is a collaborative online office suite. In versions prior to 4.2.17-1 and version 6.4.9-5, unauthenticated attackers are able to gai…EPSS 1.1%21 Jul 2021 6.1CVE-2024-45045Collabora online cross-site scripting vulnerabilityCollabora Online is a collaborative online office suite based on LibreOffice technology. In the mobile (Android/iOS) device variants of Collabora Onl…EPSS 0.29%29 Aug 2024 6.1CVE-2023-31145Collabora online cross-site scripting vulnerabilityCollabora Online is a collaborative online office suite based on LibreOffice technology. This vulnerability report describes a reflected XSS vulnerab…EPSS 0.40%15 May 2023 6.1CVE-2021-43817Collabora online cross-site scripting vulnerabilityCollabora Online is a collaborative online office suite based on LibreOffice technology. In affected versions a reflected XSS vulnerability was found…EPSS 0.65%13 Dec 2021 6.1CVE-2021-32745Collabora online cross-site scripting vulnerabilityCollabora Online is a collaborative online office suite. A reflected XSS vulnerability was found in Collabora Online prior to version 6.4.9-5. An att…EPSS 0.60%21 Jul 2021 5.3CVE-2024-25114Collabora online information exposure vulnerabilityCollabora Online is a collaborative online office suite based on LibreOffice technology. Each document in Collabora Online is opened by a separate "K…EPSS 0.47%11 Mar 2024 8.8CVE-2026-53266Linux kernel ebtables SNAT out-of-bounds write in ARP rewriteThe ebtables SNAT target rewrites the ARP sender hardware address via skb_store_bits() without first making that range writable. When the ARP SHA byt…KEVEPSS 0.65%analysed25 Jun 2026 8.8CVE-2026-87491Google Chrome V8 out-of-bounds write enables sandbox code executionChrome before 153.0.8010.36 contains an out-of-bounds write in the V8 JavaScript engine. A crafted HTML page can trigger the memory corruption, and b…KEVEPSS 3.1%analysed9 Sep 2026

Source: NIST National Vulnerability Database (record CVE-2025-66208), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.