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TI-2026-28803 Aliases CVE-2026-39940

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

Priority LOW 24CWE-601Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Spoofing
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-601.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00269 19th percentileScored 2026-11-07
Fix Fixed CRM (ChurchCRM): 7.0.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ChurchCRMCRMbefore 7.0.07.0.0Patch availableCNA
  • CRM VendorChurchCRM Affected before 7.0.0 Fixed in 7.0.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:churchcrm:churchcrm:*:*:*:*:*:*:*:*——ChurchCRM
  • cpe:2.3:a:churchcrm:churchcrm:*:*:*:*:*:*:*:* Versions — — ·ChurchCRM

Remediation

  • Fix · CNA CRM (ChurchCRM) Fixed in 7.0.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-39940

References

Other 2

  • TI-2026-30599 ChurchCRM: Incomplete fix for CVE-2026-39337: Unauthenticated RCE in Setup Wizard via unsanitized DB_PASSWORD CVSS 3.1CRITICAL 10.0
  • TI-2026-28325 ChurchCRM Affected by Unauthenticated RCE in Install Wizard CVSS 3.1CRITICAL 10.0
  • TI-2025-38761 ChurchCRM has unauthenticated RCE in its Install Wizard CVSS 3.1CRITICAL 10.0
  • TI-2024-35802 EventAttendance.php in ChurchCRM 5.7.0 is vulnerable to SQL injection. CVSS 3.1CRITICAL 9.8
  • TI-2024-16997 ChurchCRM 5.5.0 /EventEditor.php is vulnerable to Blind SQL Injection (Time-based) via the EventCount POST parameter. CVSS 3.1CRITICAL 9.8
  • TI-2025-41969 ChurchCRM vulnerable to time-based blind SQL Injection in ConfirmReportEmail.php CVSS 4.0CRITICAL 9.3
See all 126 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences