CVE-2025-66208

critical

Collabora Online - Built-in CODE Server (richdocumentscode) provides a built-in server with all of the document editing features of Collabora Online.

Vendor / product: 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.

CVSS

9.8

9.8 (CVSS v3.1)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity source: NVD CVSS v3.1 (nvd@nist.gov)

Timeline (UTC)

Published: 2025-12-03 19:15

Modified: 2026-10-18 17:10

NVD status: Analyzed

Last synced 3 days ago

Verified against the source API 2026-10-27 07:06 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

collabora / online <25.04.702

Weakness classification (CWE)

CWE-78

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Vendor advisory: https://github.com/CollaboraOnline/online/security/advisories/GHSA-j3q6-q5pc-v5wf

Patch / mitigation: https://github.com/CollaboraOnline/online/security/advisories/GHSA-j3q6-q5pc-v5wf

References

https://github.com/CollaboraOnline/online/security/advisories/GHSA-j3q6-q5pc-v5wf security-advisories@github.com

Data sources

NVD CVE API 2.0 — fetched 2026-10-27 07:06 UTC · record ↗

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CVE-2025-66208

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Weakness classification (CWE)

Mitigation & advisories

References

Data sources

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