What is CVE-2025-66208?

CVE-2025-66208 is a critical-severity vulnerability in Collabora Online, classified under OS Command Injection. CVSS score: 9.8/10. Published 2025-12-03.

How severe is CVE-2025-66208?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Collabora Online

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 Co…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.010 (58.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Collabora Online
Collaboraonline Online — versions < 25.04.702

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-66208?: CVE-2025-66208 is a critical-severity vulnerability in Collabora Online, classified under OS Command Injection. CVSS score: 9.8/10. Published 2025-12-03.
How severe is CVE-2025-66208?: Critical severity. CVSS v3 base score is 9.8 out of 10.