Persistent Cross-Site scripting in Nexus Repository Manager

published 2020-04-01 6y ago modified 2026-09-10 last mo. also GHSA-3944-787c-f852 , EUVD-2020-0359

cvss: 4.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits: 0; none known

Sonatype Nexus Repository before 3.21.2 allows XSS.

Patch / fix

fixed in 2 links 1

maven org.sonatype.nexus:nexus-core 3.21.2
sonatype nexus 3.21.2

support.sonatype.com/hc/en-us/articles/360044361594 advisory

Is CVE-2020-10203 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Exploit prediction

0.92% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	4.8	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	3.5	AV:N/AC:M/Au:S/C:N/I:P/A:N
GitHub	3.1	4.8	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
maven	org.sonatype.nexus:nexus-core	<3.21.2	3.21.2

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

support.sonatype.com /hc/en-us/articles/360044361594
web, patch, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2020-10203
advisory
securitylab.github.com /advisories/GHSL-2020-016-nxrm-sonatype
advisory

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.