Medium
ChurchCRM has an Open Redirect via the ‘linkBack’ URL Parameter in DonatedItemEditor.php
Type: advisorySources: OSV
ChurchCRM is an open-source church management system. Prior to 7.0.0, it was possible in many places across the ChurchCRM application to create a link that, when visited by an authenticated user, would redirect them to any URL chosen by an attacker if they clicked 'Cancel' button on the page. For this write-up the DonatedItemEditor.php will be used as an example, however wherever all instances of 'linkBack' should be assessed. This vulnerability is fixed in 7.0.0.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-39940
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 03:21 UTC · Revision 1
Source evidence
ChurchCRM has an Open Redirect via the ‘linkBack’ URL Parameter in DonatedItemEditor.php
core-osv · Original sourcePublished 13 Apr 2026, 16:34 UTC
ChurchCRM is an open-source church management system. Prior to 7.0.0, it was possible in many places across the ChurchCRM application to create a link that, when visited by an authenticated user, would redirect them to any URL chosen by an attacker if they clicked 'Cancel' button on the page. For this write-up the DonatedItemEditor.php will be used as an example, however wherever all instances of 'linkBack' should be assessed. This vulnerability is fixed in 7.0.0.
osv:CVE-2026-39940
Complete source record
{
"id": "9237ef8b61a9dc53bf033d10cec9cd01e4f3194dc859a2c69165f3f27b5282df",
"url": "https://osv.dev/vulnerability/CVE-2026-39940",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ChurchCRM has an Open Redirect via the ‘linkBack’ URL Parameter in DonatedItemEditor.php",
"summary": "ChurchCRM is an open-source church management system. Prior to 7.0.0, it was possible in many places across the ChurchCRM application to create a link that, when visited by an authenticated user, would redirect them to any URL chosen by an attacker if they clicked 'Cancel' button on the page. For this write-up the DonatedItemEditor.php will be used as an example, however wherever all instances of 'linkBack' should be assessed. This vulnerability is fixed in 7.0.0.",
"evidence": "osv:CVE-2026-39940",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-39940",
"aliases": [
"CVE-2026-39940"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/churchcrm/crm",
"type": "GIT",
"events": [
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{
"fixed": "17a5ff8ed6310de4d805c4d9c2f79dfa6f52af86"
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-39940.json"
}
}
],
"modified": "2026-10-28T02:30:32.838581552Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39940.json",
"https://github.com/ChurchCRM/CRM/security/advisories/GHSA-5g52-rvjf-6wwf",
"https://github.com/ChurchCRM/CRM/security/advisories/GHSA-v3hj-33xf-qx47",
"https://nvd.nist.gov/vuln/detail/CVE-2026-39940"
],
"provider_metadata": {
"cwe_ids": [
"CWE-601"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39940.json"
}
},
"related_cves": [
{
"value": "CVE-2026-39940",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 500003,
"published_at": "2026-04-13T16:34:58.495+00:00"
}