Which versions of Churchcrm are affected by EUVD-2026-19837?

ChurchCRM versions prior to 7.1.0 contain a reflected cross-site scripting vulnerability in the dashboard search function that allows unauthenticated attackers to execute arbitrary JavaScript in…. A patch is available.

How to fix or mitigate EUVD-2026-19837?

Within 24 hours: identify all ChurchCRM deployments and document current versions in use. Within 7 days: upgrade all ChurchCRM instances to version 7.1.0 or later; if immediate upgrade is not feasible, restrict dashboard access to authenticated users only and implement Web Application Firewall (WAF) rules to block malicious search parameters. Within 30 days: conduct security awareness training for users on phishing risks, audit access logs for indicators of XSS exploitation, and validate that the patched version is operating correctly in production.

Churchcrm EUVD-2026-19837

Q: What is the CVSS score of EUVD-2026-19837?

EUVD-2026-19837 has a CVSS 4.0 base score of 8.6 (High). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.1%.

| CVE-2026-39338 HIGH

Cross-site Scripting (XSS) (CWE-79)

2026-04-07 security-advisories@github.com

XSS RCE Churchcrm

8.6

CVSS 4.0 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

8.6 HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Scope

Lifecycle Timeline

Analysis Updated

Apr 16, 2026 - 06:03 EUVD-patch-fix

executive_summary

Re-analysis Queued

Apr 16, 2026 - 05:29 backfill_euvd_patch

patch_released

Patch available

Apr 16, 2026 - 05:29 EUVD

7.1.0

Re-analysis Queued

Apr 15, 2026 - 20:22 vuln.today

cvss_changed

EUVD ID Assigned

Apr 07, 2026 - 18:22 euvd

EUVD-2026-19837

Analysis Generated

Apr 07, 2026 - 18:22 vuln.today

CVE Published

Apr 07, 2026 - 18:16 nvd

HIGH 8.6

DescriptionGitHub Advisory

ChurchCRM is an open-source church management system. Prior to 7.1.0, a Blind Reflected Cross-Site Scripting vulnerability exists in the search parameter accepted by the ChurchCRM dashboard. The application fails to sanitize or encode user-supplied input prior to rendering it within the browser's DOM. Although the application ultimately returns an HTTP 500 error due to the malformed API request caused by the payload, the browser's JavaScript engine parses and executes the injected <script> tags before the error response is returned - resulting in successful code execution regardless of the server-side error. This vulnerability is fixed in 7.1.0.

AnalysisAI

Reflected cross-site scripting (XSS) in ChurchCRM's dashboard search parameter allows unauthenticated remote attackers to execute arbitrary JavaScript in victims' browsers. Versions prior to 7.1.0 fail to sanitize user input, enabling payload execution even when server-side validation triggers HTTP 500 errors. The CVSS v4.0 score of 8.6 reflects network accessibility (AV:N), low complexity (AC:L), no authentication required (PR:N), and high confidentiality/integrity impact (VC:H/VI:H). No public exploit identified at time of analysis, though EPSS data is unavailable for risk quantification.

Technical ContextAI

This vulnerability exploits a reflected XSS condition (CWE-79) in ChurchCRM's search functionality, where user-controlled input from the search parameter is echoed into the HTML response without proper encoding or sanitization. The attack vector leverages browser parsing behavior: malicious JavaScript embedded in crafted URLs executes during DOM construction before the server's error response completes processing. This timing window enables code execution despite backend validation failures. ChurchCRM, a PHP-based church management platform, processes search requests through its dashboard API endpoint. The vulnerability demonstrates a classic failure to apply output encoding per OWASP guidelines, allowing script injection through URL parameters that social engineering attacks can weaponize via phishing or malicious links.

RemediationAI

Upgrade ChurchCRM to version 7.1.0 or later, which includes input sanitization and output encoding fixes for the dashboard search parameter. Organizations should obtain the patched release from the official ChurchCRM GitHub repository and follow standard application upgrade procedures including database backups and testing in non-production environments before deployment. Vendor security advisory at https://github.com/ChurchCRM/CRM/security/advisories/GHSA-3ghg-qfqw-rcqf contains additional technical details and upgrade instructions. No workarounds are documented; upgrading to the fixed version is the only complete mitigation. Until patching is complete, implement compensating controls including web application firewall rules to filter script tags in search parameters, enforce Content Security Policy headers to restrict inline script execution, and educate users about phishing risks associated with clicking untrusted links to the ChurchCRM dashboard.