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NVD / CVE Program· CNA mitre

CVE-2021-40143: Sonatype Nexus Repository 3.x through 3.33.1-01 is vulnerable to an HTTP header injection.

Noroxi assessment

Priority: Monitor (action score 33/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 2.3% (FIRST EPSS); higher than 83.5% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: org.sonatype.nexus:nexus-repository (Maven) 3.34.0-01.

Low priority for now. Upgrade to org.sonatype.nexus:nexus-repository (Maven) 3.34.0-01 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Sonatype Nexus Repository 3.x through 3.33.1-01 is vulnerable to an HTTP header injection. By sending a crafted HTTP request, a remote attacker may disclose sensitive information or request external resources from a vulnerable instance.

HighCVSS 8.2 · v3.1—No exploit Fix available
Published
Sep 7, 2021
Updated
Sep 22, 2026
EPSS
2.3% · 83th percentile

Report tools

JSON

Action score

33

Monitor

Low priority for now.

CVSS
32 / 40 · 8.2 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.3%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
sonatypenexus repository manager

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • sonatype nexus repository manager3.0.0 and later · before 3.34.1-01

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Mavenorg.sonatype.nexus:nexus-repositoryfrom 3.0.0 · before 3.34.0-013.34.0-01

Same product

sonatype: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-7238Sonatype Nexus Repository Manager before 3.15.0 has Incorrect Access Control.KEV
    92Now
  • CVE-2019-5475The Nexus Yum Repository Plugin in v2 is vulnerable to Remote Code Execution when instances using CommandLineExecutor.java are supplied vuln
    41Plan
  • CVE-2019-9629Sonatype Nexus Repository Manager before 3.17.0 establishes a default administrator user with weak defaults (fixed credentials).
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2021-34553Jun 17, 2021 · Sonatype Nexus Repository Manager 3.x before 3.31.0 allows a remote authenticated attacker to get a list of blob files and read the content
    18Monitor
  • ← EarlierCVE-2021-37152Aug 10, 2021 · Multiple XSS issues exist in Sonatype Nexus Repository Manager 3 before 3.33.0.
    28Monitor
  • Later →CVE-2021-42568Nov 2, 2021 · Sonatype Nexus Repository Manager 3.x through 3.35.0 allows attackers to access the SSL Certificates Loading function via a low-privileged a
    17Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Maven:org.sonatype.nexus:nexus-repository3.34.0-01Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
low · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records