ChurchCRM up to 7.3.x Request Parameter FamilyCustomFieldsEditor.php parameter names/parameter values cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, has been found in ChurchCRM up to 7.3.x. Affected by this vulnerability is an unknown functionality of the file FamilyCustomFieldsEditor.php of the component Request Parameter Handler. This manipulation of the argument parameter names/parameter values causes cross site scripting. The identification of this vulnerability is CVE-2026-58411. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in ChurchCRM up to 7.3.x. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the file FamilyCustomFieldsEditor.php of the component Request Parameter Handler. The manipulation of the argument parameter names/parameter values with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

ChurchCRM is an open-source church management system. Prior to version 7.4.0, Cross-Site Scripting (XSS) vulnerabilities were identified due to insufficient output encoding of user-controlled request parameter names and parameter values. The application reflects attacker-controlled input into JavaScript string contexts and HTML attribute contexts without proper sanitization or contextual output encoding. Affected endpoints observed during testing: /FamilyCustomFieldsEditor.php, /PaddleNumList.php and /admin/system/church-info. Potential consequences include session-token theft, account takeover, unauthorized actions on behalf of authenticated users, exposure of sensitive church member information, credential harvesting, phishing, and privilege escalation when administrators are targeted. This issue has been resolved in version 7.4.0.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-58411 since 06/30/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

By approaching the search of inurl:FamilyCustomFieldsEditor.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 7.4.0 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• ChurchCRM

Version

• 7.0
• 7.1
• 7.2
• 7.3

License

• open-source

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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