CVE-2026-39940— ChurchCRM has an Open Redirect via the ‘linkBack’ URL Parameter in DonatedItemEditor.php
Quick assessment
Affected
ChurchCRM CRM
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
ChurchCRM是ChurchCRM开源的一个为教会打造的开源 CRM 系统。 ChurchCRM 7.0.0之前版本存在输入验证错误漏洞，该漏洞源于存在重定向链接，可能导致经过身份验证的用户在点击取消按钮时被重定向至攻击者指定的任意URL。
Possible ATT&CK Techniques 1 AI
T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-39940
Vulnerability Information
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Vulnerability Title
ChurchCRM has an Open Redirect via the ‘linkBack’ URL Parameter in DonatedItemEditor.php
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
ChurchCRM 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ChurchCRM是ChurchCRM开源的一个为教会打造的开源 CRM 系统。 ChurchCRM 7.0.0之前版本存在输入验证错误漏洞，该漏洞源于存在重定向链接，可能导致经过身份验证的用户在点击取消按钮时被重定向至攻击者指定的任意URL。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-39940
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V. Comments for CVE-2026-39940
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