How severe is CVE-2025-66209?

CVE-2025-66209 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-66209 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66209?

CVE-2025-66209 primarily affects Coollabs Coolify. In total, 441 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-66209?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-66209 have an EU (EUVD) identifier?

Yes. CVE-2025-66209 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204961.

When was CVE-2025-66209 published?

CVE-2025-66209 was published on 2025-12-23 and last updated on 2026-06-17.

CVE-2025-66209

CVE-2025-66209 is a critical-severity vulnerability in Coollabs Coolify with a CVSS 3.x base score of 9.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.9)
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-204961
Weakness: CWE-78
Affected product: Coollabs Coolify
Published: 2025-12-23
Last modified: 2026-06-17

Description

Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Prior to version 4.0.0-beta.451, an authenticated command injection vulnerability in the Database Backup functionality allows users with application/service management permissions to execute arbitrary commands as root on managed servers. Database names used in backup operations are passed directly to shell commands without sanitization, enabling full remote code execution. Version 4.0.0-beta.451 fixes the issue.

Frequently asked questions

What is CVE-2025-66209?: Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Prior to version 4.0.0-beta.451, an authenticated command injection vulnerability in the Database Backup functionality allows users with application/service management permissions to execute arbitrary commands as root on managed servers. Database names used in backup operations are passed directly to shell commands without sanitization, enabling full remote code execution. Version 4.0.0-beta.451 fixes the issue.
How severe is CVE-2025-66209?: CVE-2025-66209 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-66209 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66209?: CVE-2025-66209 primarily affects Coollabs Coolify. In total, 441 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-66209?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-66209 have an EU (EUVD) identifier?: Yes. CVE-2025-66209 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204961.
When was CVE-2025-66209 published?: CVE-2025-66209 was published on 2025-12-23 and last updated on 2026-06-17.

References

Affected products (441)

cpe:2.3:a:coollabs:coolify:*:*:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta100:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta101:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta102:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta103:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta104:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta105:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta106:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta107:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta108:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta109:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta110:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta111:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta112:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta113:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta114:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta115:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta116:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta117:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta118:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta119:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta120:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta121:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta122:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta123:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta124:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta125:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta126:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta127:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta128:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta129:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta130:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta131:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta132:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta133:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta134:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta135:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta136:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta137:*:*:*:*:*:*
cpe:2.3:a:coollabs:coolify:4.0.0:beta138:*:*:*:*:*:*

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