CVE-2021-21234Public exploitNetwork attack vector

Authenticated file disclosure via unchecked base path

Published Jan 5, 2021 · Updated Aug 3, 2024

Path traversal in Spring Boot Actuator LogView before 0.2.13 allows remote authenticated users to read files outside the log directory. The LogViewEndpoint.view method validates filename but resolves the unchecked base request parameter before opening the requested file. Access requires the Actuator log-view HTTP endpoint and its authentication, and disclosure is limited to files readable by the application process.

CVSS severity7.7
High
EPSS probability21.01%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Spring Boot Actuator LogView before 0.2.13 allows remote authenticated users to read files outside the log directory. The LogViewEndpoint.view method validates filename but resolves the unchecked base request parameter before opening the requested file. Access requires the Actuator log-view HTTP endpoint and its authentication, and disclosure is limited to files readable by the application process.

The record

CVE
CVE-2021-21234
Published
Jan 5, 2021
Updated
Aug 3, 2024
Vendor
Lukas Hinsch
Product
Spring Boot Actuator LogView
Classifications
CWE-22, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 5, 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?

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

  1. Affected versionversion=< 0.2.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Lukas Hinsch · Spring Boot Actuator LogViewversion=< 0.2.13

Published CVSS scores

7.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
7.7NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
4.0NIST NVDAV:N/AC:L/Au:S/C:P/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.

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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 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

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Your stack

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