CVE-2021-29159Network attack vector

Administrator-context script execution via unencoded entity properties

Published Apr 28, 2021 · Updated Aug 3, 2024

Stored XSS in Sonatype Nexus Repository Manager 3.23 through 3.30 allows remote authenticated users to execute JavaScript through crafted entities. Entity-property values are rendered into administrator-facing pages without proper output encoding, causing attacker-controlled script to run in the NXRM application context. A local NXRM account is required to create the entity, and an administrator must view it; the script can forge requests, redirect browsing, or alter displayed content.

CVSS severity5.4
Medium
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Sonatype Nexus Repository Manager 3.23 through 3.30 allows remote authenticated users to execute JavaScript through crafted entities. Entity-property values are rendered into administrator-facing pages without proper output encoding, causing attacker-controlled script to run in the NXRM application context. A local NXRM account is required to create the entity, and an administrator must view it; the script can forge requests, redirect browsing, or alter displayed content.

The record

CVE
CVE-2021-29159
Published
Apr 28, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 28, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
5.4SonatypeCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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