ChurchCRM: Username Enumeration via Differential Response in Public Login API

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Summary

CVECVE-2026-40485
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-18 00:16:39 UTC
Updated2026-04-18 00:16:39 UTC
DescriptionChurchCRM is an open-source church management system. In versions prior to 7.2.0, the public API login endpoint (/api/public/user/login) returns distinguishable HTTP response codes based on whether a username exists: 404 for non-existent users and 401 for valid users with incorrect passwords. An unauthenticated attacker can exploit this difference to enumerate valid usernames, with no rate limiting or account lockout to impede the process. This issue has been fixed in version 7.2.0.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

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

Problem Types: CWE-204 | CWE-307 | CWE-307 CWE-307: Improper Restriction of Excessive Authentication Attempts | CWE-204 CWE-204: Observable Response Discrepancy

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA ChurchCRM CRM affected < 7.2.0 Not specified

References

ReferenceSourceLinkTags
github.com/ChurchCRM/CRM/pull/8607 [email protected] github.com
github.com/ChurchCRM/CRM/security/advisories/GHSA-x2qh-xmhq-4jpx [email protected] github.com
github.com/ChurchCRM/CRM/commit/214694eb83778e1f5e52b3dfa2a99d0e965c1850 [email protected] github.com
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