CVE•Published 2026-05-21•Modified 2026-05-26•1 article on news•5 live references•NVD data
CVE-2026-8350Concretecms · Concrete_cms
Vulnerability data via NVD (ingested)
CVSS v3.1
8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
—
Weaknesses (CWE)
Description
Concrete CMS 9.5.0 and below is vulnerable to missing authorization in the bulk_user_assignment.php which can lead to privilege escalation to Administrative Group. Any authenticated user with access to the bulk user assignment dashboard page can add any user email to any group and can remove legitimate admins. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 7.5 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N. Thanks Vincent55 for reporting.
Timeline
Published 2026-05-21
Modified 2026-05-26
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-8350Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Concretecms Concrete Cms"All exposed Concretecms Concrete Cms instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Concrete Cms"HTTP body or banner mentions "Concrete Cms" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-8350Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-8350Censys host search filtered to this CVE id.
grep.app
CVE-2026-8350Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-8350GitHub code search for direct mentions.
Google dork
"CVE-2026-8350" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.