CVE-2020-28848Public exploitNetwork attack vector

Client code execution via formula-bearing CSV export

Published Aug 11, 2023 · Updated Oct 9, 2024

CSV injection in ChurchCRM 4.2.0 allows remote authenticated users to execute code when an event-type export is opened in a spreadsheet. EventNames.php writes the attacker-controlled Name field to CSV without neutralizing a leading formula character, so spreadsheet software evaluates the field as a formula. An authenticated user must store the payload, and a recipient must open the export and enable external content or macros; execution occurs on the recipient's client.

CVSS severity8.8
High
EPSS probability1.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSV injection in ChurchCRM 4.2.0 allows remote authenticated users to execute code when an event-type export is opened in a spreadsheet. EventNames.php writes the attacker-controlled Name field to CSV without neutralizing a leading formula character, so spreadsheet software evaluates the field as a formula. An authenticated user must store the payload, and a recipient must open the export and enable external content or macros; execution occurs on the recipient's client.

The record

CVE
CVE-2020-28848
Published
Aug 11, 2023
Updated
Oct 9, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-74, T1204.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 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

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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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