Vulnerability · Published Apr 13, 2026 · Assigned by GitHub_M

CVE-2026-39940ChurchCRM has an Open Redirect via the ‘linkBack’ URL Parameter in DonatedItemEditor.php

Medium 5.3

In plain English

A medium-severity open redirect in CRM from ChurchCRM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).

Severity (CVSS 4.0)5.3Medium

Exploit odds (30 days)0.3%top 80.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
ChurchCRM	CRM	< 7.0.0

Weakness: CWE-601 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

References

https://github.com/ChurchCRM/CRM/security/advisories/GHSA-5g52-rvjf-6wwf x_refsource_CONFIRM
https://github.com/ChurchCRM/CRM/security/advisories/GHSA-v3hj-33xf-qx47 x_refsource_MISC