CVE-2023-26843Public exploitNetwork attack vector

Stored script execution via unescaped note content

Published Apr 25, 2023 · Updated Feb 4, 2025

Stored XSS in NoteEditor.php in ChurchCRM 4.5.3 allows remote authenticated users to execute scripts through a crafted note body. The editor's Source mode accepts attacker-controlled HTML in NoteText, stores it, and renders it on the associated family or person page without effective output neutralization. Low-privileged application access and a later family or person page view are required; script execution occurs in that viewer's browser context.

CVSS severity5.4
Medium
EPSS probability1.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in NoteEditor.php in ChurchCRM 4.5.3 allows remote authenticated users to execute scripts through a crafted note body. The editor's Source mode accepts attacker-controlled HTML in NoteText, stores it, and renders it on the associated family or person page without effective output neutralization. Low-privileged application access and a later family or person page view are required; script execution occurs in that viewer's browser context.

The record

CVE
CVE-2023-26843
Published
Apr 25, 2023
Updated
Feb 4, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4INCIBE-CERTCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/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.

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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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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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