CVE-2021-23407Public exploitNetwork attack vector

File placement outside volume via crafted names

Published Jul 14, 2021 · Updated Sep 16, 2024

Path traversal in elFinder.Net.Core before 1.2.4 allows remote attackers to place uploaded files outside the configured volume. File-system driver rename paths combine a user-controlled name without verifying that the resolved path remains beneath the volume root. The ASP.NET host must expose the connector, and no authentication or user interaction is required; traversal can place an uploaded file in a parent directory.

CVSS severity7.5
High
EPSS probability2.00%
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 elFinder.Net.Core before 1.2.4 allows remote attackers to place uploaded files outside the configured volume. File-system driver rename paths combine a user-controlled name without verifying that the resolved path remains beneath the volume root. The ASP.NET host must expose the connector, and no authentication or user interaction is required; traversal can place an uploaded file in a parent directory.

The record

CVE
CVE-2021-23407
Published
Jul 14, 2021
Updated
Sep 16, 2024
Vendor
trannamtrung1st
Product
elFinder.Net.Core
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 14, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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 <unspecified
  2. Affected versionversion=unspecified <1.2.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

trannamtrung1st · elFinder.Net.Coreversion=0 <unspecified; version=unspecified <1.2.4

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5SnykCVSS: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')
T1190Exploit Public-Facing Application

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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