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TI-2026-42021 Aliases CVE-2026-58409

ChurchCRM: Authenticated Remote Code Execution (RCE) via Malicious Plugin Upload

Priority HIGH 74CWE-434Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-434.

Summary

ChurchCRM is an open-source church management system. Prior to version 7.4.0, an authenticated administrator can achieve Remote Code Execution (RCE) on the server by installing a malicious plugin ZIP archive containing a PHP webshell. The application explicitly includes 'php' in its ALLOWED_EXTENSIONS list, while the dangerous extensions denylist (DENIED_EXTENSIONS) fails to block standard .php files. Because `php` is explicitly included in the allowed extension list for plugin archives, and extracted files are placed directly under the web root, any PHP file inside the ZIP becomes immediately executable via HTTP — without even needing to "enable" the plugin through the application UI. The /plugins/install-url API route (management.php) allows an administrator to source the malicious ZIP from any attacker-controlled HTTPS URL, validating it only against an attacker-supplied SHA-256 hash. This issue has been fixed in version 7.4.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00569 47th percentileScored 2026-11-08
Fix Fixed CRM (ChurchCRM): 7.4.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

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 7.4.07.4.0Patch availableCNA
  • CRM VendorChurchCRM Affected before 7.4.0 Fixed in 7.4.0 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 7.4.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-58409
  2. 2026-10-25 EPSS moved to the below the 50th percentile

References

Other 1

  • 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