How severe is CVE-2025-15621?

CVE-2025-15621 has a CVSS 4.0 base score of 5.7, rated medium severity.

Is CVE-2025-15621 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-15621?

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

Does CVE-2025-15621 have an EU (EUVD) identifier?

Yes. CVE-2025-15621 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209499.

When was CVE-2025-15621 published?

CVE-2025-15621 was published on 2026-04-16 and last updated on 2026-06-17.

CVE-2025-15621

CVE-2025-15621 is a medium-severity vulnerability with a CVSS 4.0 base score of 5.7. 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-522.

Key facts

Severity: Medium (CVSS 4.0 base score 5.7)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-209499
Weakness: CWE-522
Published: 2026-04-16
Last modified: 2026-06-17

Description

Insufficiently Protected Credentials in Sparx Systems Pty Ltd. Sparx Enterprise Architect. Client does not verify the receiver of OAuth2 credentials during OpenID authentication

Frequently asked questions

What is CVE-2025-15621?: Insufficiently Protected Credentials in Sparx Systems Pty Ltd. Sparx Enterprise Architect. Client does not verify the receiver of OAuth2 credentials during OpenID authentication
How severe is CVE-2025-15621?: CVE-2025-15621 has a CVSS 4.0 base score of 5.7, rated medium severity.
Is CVE-2025-15621 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-15621?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-15621 have an EU (EUVD) identifier?: Yes. CVE-2025-15621 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209499.
When was CVE-2025-15621 published?: CVE-2025-15621 was published on 2026-04-16 and last updated on 2026-06-17.

References

https://sparxsystems.com/products/ea/17.1/history.html

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