CVE-2021-24144Public exploitNetwork attack vector

Spreadsheet command execution via unneutralized CSV formulas

Published Mar 18, 2021 · Updated Aug 3, 2024

CSV formula injection in CipherCoin Database Addon for Contact Form 7 before 1.2.5.6 allows remote attackers to plant formulas in exports. The plugin stores untrusted Contact Form 7 field values and writes them into CSV cells without neutralizing leading spreadsheet formula characters. Exploitation requires an administrator to export and open the crafted submission in spreadsheet software, where supported formula features can execute commands or transmit data with that user's privileges.

CVSS severity7.8
High
EPSS probability1.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSV formula injection in CipherCoin Database Addon for Contact Form 7 before 1.2.5.6 allows remote attackers to plant formulas in exports. The plugin stores untrusted Contact Form 7 field values and writes them into CSV cells without neutralizing leading spreadsheet formula characters. Exploitation requires an administrator to export and open the crafted submission in spreadsheet software, where supported formula features can execute commands or transmit data with that user's privileges.

The record

CVE
CVE-2021-24144
Published
Mar 18, 2021
Updated
Aug 3, 2024
Vendor
CipherCoin
Product
Database Addon for Contact Form 7 – CFDB7
Classifications
CWE-1236, CWE-74, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 18, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=1.2.5.6 <1.2.5.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CipherCoin · Database Addon for Contact Form 7 – CFDB7version=1.2.5.6 <1.2.5.6

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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-1236Improper Neutralization of Formula Elements in a CSV File
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1204.002Malicious File

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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