CVE-2021-24820Public exploitNetwork attack vector

Authenticated PHP file inclusion via Layout traversal

Published Feb 28, 2022 · Updated Aug 3, 2024

Path traversal in Nicdark Cost Calculator 1.6 and earlier allows remote authenticated users to include local PHP files through post Layout values. The plugin accepts traversal sequences in a calculator post's Layout value and resolves them as a Windows path when loading the selected layout file. Contributor access suffices before 1.5, while 1.5 through 1.6 requires Administrator access; previewing the shortcode-backed post triggers inclusion of an attacker-chosen local PHP file.

CVSS severity6.5
Medium
EPSS probability3.05%
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 Nicdark Cost Calculator 1.6 and earlier allows remote authenticated users to include local PHP files through post Layout values. The plugin accepts traversal sequences in a calculator post's Layout value and resolves them as a Windows path when loading the selected layout file. Contributor access suffices before 1.5, while 1.5 through 1.6 requires Administrator access; previewing the shortcode-backed post triggers inclusion of an attacker-chosen local PHP file.

The record

CVE
CVE-2021-24820
Published
Feb 28, 2022
Updated
Aug 3, 2024
Vendor
Nicdark
Product
Cost Calculator
Classifications
CWE-22, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 28, 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?

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

  1. Affected versionversion=1.6 <=1.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nicdark · Cost Calculatorversion=1.6 <=1.6

Published CVSS scores

4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
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.

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
Privilegesauthenticated
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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