ChurchCRM has Stored XSS in Group Name

published 2026-04-07 7 mo ago modified 2026-10-26 13 d ago also EUVD-2026-19773

cvss: 8.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 16%
public exploits: 0; none known

ChurchCRM is an open-source church management system. Prior to 6.5.3, a Stored Cross-Site Scripting (Stored XSS) vulnerability in the admin panel’s group-creation feature allows any user with group-creation privileges to inject malicious JavaScript that executes automatically when an administrator views the page. This enables attackers to steal the administrator’s session cookies, potentially leading to full administrative account takeover. This vulnerability is fixed in 6.5.3.

Patch / fix

fixed in 1

churchcrm churchcrm 6.5.3

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 7 mo ago (2026-04-07)

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.0	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Affected products

ChurchCRM CRM

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation
CWE-1004 Sensitive Cookie Without 'HttpOnly' Flag

References

github.com /ChurchCRM/CRM/security/advisories/GHSA-gc8q-2gw7-qj7w
third-party-advisory

Sources

CVE List CVE-2026-35575
NVD CVE-2026-35575

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary