What’s Vulnerable › Vulnerabilities
CVE-2025-66208: Configuration-Dependent RCE (OS Command Injection) in richdocumentscode proxy
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.8% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-12-03 · updated 2026-10-18
- Weakness: CWE-78
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.
Affected products
- CollaboraOnline online: before 25.04.702 — fixed in 25.04.702
How to fix
Upgrade to a fixed version: CollaboraOnline online 25.04.702. Check the vendor advisory for mitigations.
References
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