{
"id": "GHSA-vpgr-cwfx-pwfw",
"aliases": [
"CVE-2026-8240"
],
"details": "Concrete CMS 9.5.0 and below is vulnerable to unauthenticated page metadata disclosure across every page with a configured summary template, revealing the existence of private, draft, and restricted pages while leaking title, path, description, and author information.",
"summary": "Concrete CMS is vulnerable to unauthenticated page metadata disclosure",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "9.5.1"
}
]
}
],
"package": {
"name": "concrete5/concrete5",
"ecosystem": "Packagist"
}
}
],
"modified": "2026-06-24T21:09:11Z",
"severity": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
}
],
"published": "2026-05-22T00:31:16Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8240",
"type": "ADVISORY"
},
{
"url": "https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes",
"type": "WEB"
},
{
"url": "https://github.com/concretecms/concretecms",
"type": "PACKAGE"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-284"
],
"severity": "MODERATE",
"github_reviewed": true,
"nvd_published_at": "2026-05-21T22:16:50Z",
"github_reviewed_at": "2026-06-24T21:09:11Z"
}
}