CVE-2021-45789Public exploitNetwork attack vector

Authenticated file read via unvalidated download path

Published Dec 27, 2021 · Updated Aug 4, 2024

Path traversal in MeterSphere 1.15.4 allows remote authenticated users to read arbitrary server files through the automation download API. The ApiAutomationService.loadFileAsBytes method concatenates request-controlled id and name values into a filesystem path and opens the result without validating its location. A valid account and network access to /api/automation/file/download are required, and successful exploitation discloses file contents readable by the service process.

CVSS severity6.5
Medium
EPSS probability0.89%
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 MeterSphere 1.15.4 allows remote authenticated users to read arbitrary server files through the automation download API. The ApiAutomationService.loadFileAsBytes method concatenates request-controlled id and name values into a filesystem path and opens the result without validating its location. A valid account and network access to /api/automation/file/download are required, and successful exploitation discloses file contents readable by the service process.

The record

CVE
CVE-2021-45789
Published
Dec 27, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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.

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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

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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