What is CVE-2021-43961?

CVE-2021-43961 is a medium-severity vulnerability in Sonatype Nexus Repository Manager, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2022-03-17.

How severe is CVE-2021-43961?

Medium severity. CVSS v3 base score is 4.3 out of 10.

XSS in Sonatype Nexus Repository Manager

CVE-2021-43961

Sonatype Nexus Repository Manager 3.36.0 allows HTML Injection.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-03-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (52.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.3% 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

Sonatype Nexus Repository Manager

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

issues.sonatype.org/secure/ReleaseNote.jspa (Release Notes, Vendor Advisory)
support.sonatype.com/hc/en-us/articles/4412183372307 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-43961?: CVE-2021-43961 is a medium-severity vulnerability in Sonatype Nexus Repository Manager, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2022-03-17.
How severe is CVE-2021-43961?: Medium severity. CVSS v3 base score is 4.3 out of 10.