How severe is CVE-2025-8866?

CVE-2025-8866 has a CVSS 4.0 base score of 5.1, rated medium severity.

Is CVE-2025-8866 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-8866?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-8866 have an EU (EUVD) identifier?

Yes. CVE-2025-8866 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24153.

When was CVE-2025-8866 published?

CVE-2025-8866 was published on 2025-08-11 and last updated on 2026-06-17.

CVE-2025-8866

CVE-2025-8866 is a medium-severity vulnerability with a CVSS 4.0 base score of 5.1. 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-200.

Key facts

Severity: Medium (CVSS 4.0 base score 5.1)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-24153
Weakness: CWE-200
Published: 2025-08-11
Last modified: 2026-06-17

Description

YugabyteDB Anywhere web server does not properly enforce authentication for the /metamaster/universe API endpoint. An unauthenticated attacker could exploit this flaw to obtain server networking configuration details, including private and public IP addresses and DNS records.

Frequently asked questions

What is CVE-2025-8866?: YugabyteDB Anywhere web server does not properly enforce authentication for the /metamaster/universe API endpoint. An unauthenticated attacker could exploit this flaw to obtain server networking configuration details, including private and public IP addresses and DNS records.
How severe is CVE-2025-8866?: CVE-2025-8866 has a CVSS 4.0 base score of 5.1, rated medium severity.
Is CVE-2025-8866 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-8866?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-8866 have an EU (EUVD) identifier?: Yes. CVE-2025-8866 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24153.
When was CVE-2025-8866 published?: CVE-2025-8866 was published on 2025-08-11 and last updated on 2026-06-17.

References

https://docs.yugabyte.com/preview/secure/vulnerability-disclosure-policy/

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