CVE-2021-28376Public exploitNetwork attack vector

Arbitrary file read via unfiltered fname path

Published Jan 12, 2022 · Updated Aug 3, 2024

Path traversal in ChronoEngine ChronoForms 7.0.7 allows remote authenticated users to read arbitrary server files through fname. The log-download controller concatenates the unfiltered fname value with the configured upload path and passes the result to the download routine. Administration permissions are required, and exploitation exposes readable files, including the Joomla configuration file and its stored credentials.

CVSS severity2.7
Low
EPSS probability1.08%
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 ChronoEngine ChronoForms 7.0.7 allows remote authenticated users to read arbitrary server files through fname. The log-download controller concatenates the unfiltered fname value with the configured upload path and passes the result to the download routine. Administration permissions are required, and exploitation exposes readable files, including the Joomla configuration file and its stored credentials.

The record

CVE
CVE-2021-28376
Published
Jan 12, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1005
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 12, 2022CVE 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

2.7NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/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.

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
Privilegesadmin
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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