CVE-2026-35574: ChurchCRM has a Stored XSS in Person Profile - Add a Note

Severity: high (CVSS 8.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-04-07 · updated 2026-10-26
Weakness: CWE-79

Description

ChurchCRM is an open-source church management system. Prior to 6.5.3, a stored Cross-Site Scripting (XSS) vulnerability in ChurchCRM's Note Editor allows authenticated users with note-adding permissions to execute arbitrary JavaScript code in the context of other users' browsers, including administrators. This can lead to session hijacking, privilege escalation, and unauthorized access to sensitive church member data. This vulnerability is fixed in 6.5.3.

Affected products

ChurchCRM CRM: before 6.5.3 — fixed in 6.5.3

How to fix

Upgrade to a fixed version: ChurchCRM CRM 6.5.3. Check the vendor advisory for mitigations.

References

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