What is CVE-2020-10203?

CVE-2020-10203 is a medium-severity vulnerability in Sonatype Nexus, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2020-04-01.

How severe is CVE-2020-10203?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Sonatype Nexus

CVE-2020-10203

Sonatype Nexus Repository before 3.21.2 allows XSS.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-04-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.009 (58.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Sonatype Nexus

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

support.sonatype.com/hc/en-us/articles/360044361594 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2020-10203?: CVE-2020-10203 is a medium-severity vulnerability in Sonatype Nexus, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2020-04-01.
How severe is CVE-2020-10203?: Medium severity. CVSS v3 base score is 4.8 out of 10.