How severe is CVE-2025-40645?

CVE-2025-40645 has a CVSS 4.0 base score of 8.7, rated high severity.

Is CVE-2025-40645 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-40645?

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-2025-40645 have an EU (EUVD) identifier?

Yes. CVE-2025-40645 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-32670.

When was CVE-2025-40645 published?

CVE-2025-40645 was published on 2025-10-02 and last updated on 2026-06-17.

CVE-2025-40645

CVE-2025-40645 is a high-severity vulnerability with a CVSS 4.0 base score of 8.7. 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: High (CVSS 4.0 base score 8.7)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-32670
Weakness: CWE-200
Published: 2025-10-02
Last modified: 2026-06-17

Description

Exposure of sensitive information in Viday. This vulnerability could allow an unauthenticated attacker to obtain sensitive information about customers by sending an HTTP GET request to “/api/reserva/web/clients” using the “phone” parameter.

Frequently asked questions

What is CVE-2025-40645?: Exposure of sensitive information in Viday. This vulnerability could allow an unauthenticated attacker to obtain sensitive information about customers by sending an HTTP GET request to “/api/reserva/web/clients” using the “phone” parameter.
How severe is CVE-2025-40645?: CVE-2025-40645 has a CVSS 4.0 base score of 8.7, rated high severity.
Is CVE-2025-40645 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-40645?: 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-2025-40645 have an EU (EUVD) identifier?: Yes. CVE-2025-40645 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-32670.
When was CVE-2025-40645 published?: CVE-2025-40645 was published on 2025-10-02 and last updated on 2026-06-17.

References

https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-viday

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