How severe is CVE-2025-56404?

CVE-2025-56404 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-56404 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-56404?

CVE-2025-56404 affects Mariadb Model Context Protocol. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-56404?

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

Does CVE-2025-56404 have an EU (EUVD) identifier?

Yes. CVE-2025-56404 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27553.

When was CVE-2025-56404 published?

CVE-2025-56404 was published on 2025-09-10 and last updated on 2026-06-17.

CVE-2025-56404

CVE-2025-56404 is a high-severity vulnerability in Mariadb Model Context Protocol with a CVSS 3.x base score of 7.5. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-27553
Weakness: CWE-20
Affected product: Mariadb Model Context Protocol
Published: 2025-09-10
Last modified: 2026-06-17

Description

An issue was discovered in MariaDB MCP 0.1.0 allowing attackers to gain sensitive information via the SSE service as the SSE service lacks user validation.

Frequently asked questions

What is CVE-2025-56404?: An issue was discovered in MariaDB MCP 0.1.0 allowing attackers to gain sensitive information via the SSE service as the SSE service lacks user validation.
How severe is CVE-2025-56404?: CVE-2025-56404 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-56404 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-56404?: CVE-2025-56404 affects Mariadb Model Context Protocol. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-56404?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-56404 have an EU (EUVD) identifier?: Yes. CVE-2025-56404 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27553.
When was CVE-2025-56404 published?: CVE-2025-56404 was published on 2025-09-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mariadb:model_context_protocol:0.1.0:*:*:*:*:*:*:*

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