CVE-2026-39941 ChurchCRM has an XSS vulnerability

Medium 5.3 Published 9 Apr 2026 Updated 10 Apr 2026

Attackers can execute arbitrary JavaScript in victims' browsers via unsanitized input in ChurchCRM event attendee fields.

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-2026-39941?

CVE-2026-39941 is a medium-severity cross-site scripting vulnerability in Churchcrm Churchcrm, published on 9 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, an XSS vulnerability allows attacker-supplied input sent via a the EName and EDesc parameters in EditEventAttendees.php to be rendered in a page without proper output encoding, enabling arbitrary JavaScript execution in victims' browsers. This vulnerability is fixed in 7.1.0.

Weakness: CWE-80, CWE-79

Which versions are affected by CVE-2026-39941?

It affects 1 product.

Products include Churchcrm Churchcrm.

How do I fix CVE-2026-39941?

No fix has been published for CVE-2026-39941 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-2026-39941 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39941 exists.

All Churchcrm Churchcrm vulnerabilities

Sources

Also known as GHSA-4mqw-9jww-2c58.