XSS in Churchcrm
CVE-2026-39338
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.002 (12.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Churchcrm
- Churchcrm Crm — versions < 7.1.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-39338?
- CVE-2026-39338 is a medium-severity vulnerability in Churchcrm, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-07.
- How severe is CVE-2026-39338?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2026-39338 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.