CVE-2026-35575: ChurchCRM has Stored XSS in Group Name

Severity: high (CVSS 8.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
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 (Stored XSS) vulnerability in the admin panel’s group-creation feature allows any user with group-creation privileges to inject malicious JavaScript that executes automatically when an administrator views the page. This enables attackers to steal the administrator’s session cookies, potentially leading to full administrative account takeover. 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

https://github.com/ChurchCRM/CRM/security/advisories/GHSA-gc8q-2gw7-qj7w

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