CVE-2021-32769Public exploitNetwork attack vector

Arbitrary file read via static-resource traversal

Published Jul 16, 2021 · Updated Aug 3, 2024

Path traversal in Micronaut Core before 2.5.9 allows remote attackers to read arbitrary filesystem files through crafted static-resource URLs. DefaultFileSystemResourceLoader resolves request paths but, before the patch, opens the result without verifying that its real path remains under the configured resource base. An unauthenticated network request reaches the flaw when file-backed static resources are enabled with a recursive ** mapping, exposing readable host files.

CVSS severity7.5
High
EPSS probability1.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Path traversal in Micronaut Core before 2.5.9 allows remote attackers to read arbitrary filesystem files through crafted static-resource URLs. DefaultFileSystemResourceLoader resolves request paths but, before the patch, opens the result without verifying that its real path remains under the configured resource base. An unauthenticated network request reaches the flaw when file-backed static resources are enabled with a recursive ** mapping, exposing readable host files.

The record

CVE
CVE-2021-32769
Published
Jul 16, 2021
Updated
Aug 3, 2024
Vendor
Micronaut Foundation
Product
Micronaut Core
Classifications
CWE-22, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 16, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.5.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Micronaut Foundation · Micronaut Coreversion=< 2.5.9

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo