How severe is CVE-2026-39344?

CVE-2026-39344 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-39344 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-39344?

CVE-2026-39344 affects Churchcrm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-39344?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-39344 have an EU (EUVD) identifier?

Yes. CVE-2026-39344 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19849.

When was CVE-2026-39344 published?

CVE-2026-39344 was published on 2026-04-07 and last updated on 2026-06-17.

CVE-2026-39344

CVE-2026-39344 is a high-severity vulnerability in Churchcrm with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19849
Weakness: CWE-79
Affected product: Churchcrm
Published: 2026-04-07
Last modified: 2026-06-17

Description

ChurchCRM is an open-source church management system. Prior to 7.1.0, there is a Reflected Cross-Site Scripting (XSS) vulnerability on the login page, which is caused by the lack of sanitization or encoding of the username parameter received from the URL. The username parameter value is directly displayed in the login page input element without filter, allowing attackers to insert malicious JavaScript scripts. If successful, script can be executed on the client side, potentially stealing sensitive data such as session cookies or replacing the display to show the attacker's login form. This vulnerability is fixed in 7.1.0.

Frequently asked questions

What is CVE-2026-39344?: ChurchCRM is an open-source church management system. Prior to 7.1.0, there is a Reflected Cross-Site Scripting (XSS) vulnerability on the login page, which is caused by the lack of sanitization or encoding of the username parameter received from the URL. The username parameter value is directly displayed in the login page input element without filter, allowing attackers to insert malicious JavaScript scripts. If successful, script can be executed on the client side, potentially stealing sensitive data such as session cookies or replacing the display to show the attacker's login form. This vulnerability is fixed in 7.1.0.
How severe is CVE-2026-39344?: CVE-2026-39344 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-39344 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-39344?: CVE-2026-39344 affects Churchcrm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-39344?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-39344 have an EU (EUVD) identifier?: Yes. CVE-2026-39344 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19849.
When was CVE-2026-39344 published?: CVE-2026-39344 was published on 2026-04-07 and last updated on 2026-06-17.

References

https://github.com/ChurchCRM/CRM/security/advisories/GHSA-rx8c-j7x8-w3hj

Affected products (1)

cpe:2.3:a:churchcrm:churchcrm:*:*:*:*:*:*:*:*

More vulnerabilities in Churchcrm

CVE-2026-39337 — Critical (CVSS 10.0): ChurchCRM is an open-source church management system. Prior to 7.1.0, critical pre-authentication remote code execution…
CVE-2025-62521 — Critical (CVSS 10.0): ChurchCRM is an open-source church management system. Prior to version 5.21.0, a pre-authentication remote code…
CVE-2025-68110 — Critical (CVSS 9.9): ChurchCRM is an open-source church management system. Versions prior to 6.5.3 may disclose database information in an…
CVE-2025-1023 — Critical (CVSS 9.8): A vulnerability exists in ChurchCRM 5.13.0 and prior that allows an attacker to execute arbitrary SQL queries by…
CVE-2024-53438 — Critical (CVSS 9.8): EventAttendance.php in ChurchCRM 5.7.0 is vulnerable to SQL injection. An attacker can exploit this vulnerability by…
CVE-2024-25897 — Critical (CVSS 9.8): ChurchCRM 5.5.0 FRCatalog.php is vulnerable to Blind SQL Injection (Time-based) via the CurrentFundraiser GET parameter.

All CVEs affecting Churchcrm →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →