CVE-2026-39940 Details
Description
ChurchCRM is an open-source church management system. Prior to 7.0.0, it was possible in many places across the ChurchCRM application to create a link that, when visited by an authenticated user, would redirect them to any URL chosen by an attacker if they clicked 'Cancel' button on the page. For this write-up the DonatedItemEditor.php will be used as an example, however wherever all instances of 'linkBack' should be assessed. This vulnerability is fixed in 7.0.0.
An open redirect vulnerability has been identified in ChurchCRM, an open-source church management system, in versions prior to 7.0.0. The issue arises in multiple locations within the application where the 'linkBack' URL parameter is used. The application fails to validate this parameter, allowing attackers to specify arbitrary URLs. When an authenticated user clicks the 'Cancel' button on the affected page, they are redirected to the attacker-controlled URL without any safety checks.
Users can upgrade to ChurchCRM version 7.1.0 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Apr 13, 2026CISA-ADP
Assessed Apr 16, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/ChurchCRM/CRM/security/advisories/GHSA-5g52-rvjf-6wwf | [email protected] | AdvisoryVendor |
| https://github.com/ChurchCRM/CRM/security/advisories/GHSA-v3hj-33xf-qx47 | [email protected] | AdvisoryExploitTechnical DescriptionVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-601 | URL Redirection to Untrusted Site ('Open Redirect') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| ChurchCRM | <= 7.0.5 (semver) 6.8.0 (semver) |
CPE
Remediation
| |
| ChurchCRM DonatedItemEditor.php | All versions |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 13, 2026 | New CVE Received | [email protected] |