What is CVE-2025-15621?

CVE-2025-15621 is a medium-severity vulnerability in Sparxsystems Enterprise Architect, classified under Insufficiently Protected Credentials. CVSS score: 6.0/10. Published 2026-04-16.

How severe is CVE-2025-15621?

Medium severity. CVSS v3 base score is 6.0 out of 10.

Vulnerability in Sparxsystems Enterprise Architect

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

Published 2026-04-16 · last modified 2026-08-21.

CVSS v3 metric

CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.001 (1.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Sparxsystems Enterprise Architect
Sparx Systems Pty Ltd. Enterprise Architect — versions 16.1.1627, 17.1.1714

Weakness classification (CWE)

CWE-522 — Insufficiently Protected Credentials

References

db4dfee8-a97e-4877-bfae-eba6d14a2166 (Release Notes)

Frequently asked questions

What is CVE-2025-15621?: CVE-2025-15621 is a medium-severity vulnerability in Sparxsystems Enterprise Architect, classified under Insufficiently Protected Credentials. CVSS score: 6.0/10. Published 2026-04-16.
How severe is CVE-2025-15621?: Medium severity. CVSS v3 base score is 6.0 out of 10.