CVE-2026-39338 ChurchCRM has Blind XSS via Global Search – Administrative Cookie Session Exfiltration
Attackers can execute arbitrary JavaScript via blind XSS in the search parameter to steal administrative session cookies.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-39338?
CVE-2026-39338 is a high-severity cross-site scripting vulnerability in Churchcrm Churchcrm, published on 7 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Which versions are affected by CVE-2026-39338?
It affects 1 product.
Products include Churchcrm Churchcrm.
How do I fix CVE-2026-39338?
No fix has been published for CVE-2026-39338 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-39338 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39338 exists.
Other vulnerabilities in Churchcrm Churchcrm
Sources
Also known as GHSA-3ghg-qfqw-rcqf.