CVE-2023-26839Public exploitNetwork attack vector

Person-record tampering via tokenless cross-origin submission

Published Apr 25, 2023 · Updated Feb 4, 2025

Cross-site request forgery in ChurchCRM 4.5.3 allows remote attackers to alter existing people's records through PersonEditor.php. PersonEditor.php accepts an automatically submitted cross-origin POST containing person fields and a save action without a request-specific anti-CSRF value. A logged-in victim authorized to edit people must load attacker-controlled content, after which names, addresses, contact details, and other person data are overwritten.

CVSS severity4.3
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in ChurchCRM 4.5.3 allows remote attackers to alter existing people's records through PersonEditor.php. PersonEditor.php accepts an automatically submitted cross-origin POST containing person fields and a save action without a request-specific anti-CSRF value. A logged-in victim authorized to edit people must load attacker-controlled content, after which names, addresses, contact details, and other person data are overwritten.

The record

CVE
CVE-2023-26839
Published
Apr 25, 2023
Updated
Feb 4, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-352, T1204
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 4, 2025Record 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
4.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/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-352Cross-Site Request Forgery (CSRF)
T1204User Execution

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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