How severe is CVE-2020-5663?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Neuroinformatics Unit, Integrative Computational Brain Science Collaboration Division, Riken Center For Xoonips

CVE-2020-5663

Stored cross-site scripting vulnerability in XooNIps 3.49 and earlier allows remote authenticated attackers to inject arbitrary script via unspecified vectors.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-11-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (51.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Neuroinformatics Unit, Integrative Computational Brain Science Collaboration Division, Riken Center For Xoonips — versions 3.49 and earlier
Riken Xoonips

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

xoonips.osdn.jp/modules/news/index.php (Release Notes, Vendor Advisory)
jvn.jp/en/vu/JVNVU92053563/index.html (Third Party Advisory)

Frequently asked questions

What is CVE-2020-5663?: CVE-2020-5663 is a medium-severity vulnerability in Neuroinformatics Unit, Integrative Computational Brain Science Collaboration Division, Riken Center For Xoonips, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-11-16.
How severe is CVE-2020-5663?: Medium severity. CVSS v3 base score is 5.4 out of 10.