Critical severity9.8NVD Advisory· Published Dec 3, 2025· Updated Jun 17, 2026

CVE-2025-66208

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Collaboraonline/Online2 versions
cpe:2.3:a:collabora:online:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:collabora:online:*:*:*:*:*:*:*:*range: <25.04.702
- (no CPE)range: < 25.04.702
Collaboraonline/richdocumentscodellm-fuzzy
Range: <25.04.702

Patches

Vulnerability mechanics

References

github.com/CollaboraOnline/online/security/advisories/GHSA-j3q6-q5pc-v5wfnvdPatchVendor Advisory

News mentions

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cvss	0.637
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000