Is Concrete CMS 8.5.21 patched?
Current stable (9.5.4): 100/100
8.5.21 has 12 open critical-or-high vulnerabilities. Run 9.5.4 or later to clear them. See what 9.5.4 fixes →
Summary iPlain-English security status for Concrete CMS 8.5.21, built from its CVEs, active-exploitation data, end-of-life date and latest release.
Concrete CMS 8.5.21 is part of the 8.5 release line. 57 known vulnerabilities affect it. The minimum safe version is 9.5.4 — upgrade to it or later to clear the open critical/high issues. The latest supported Concrete CMS release is 9.5.4.
Known issues affecting 8.5.21
Exploited first, then by exploitation probability.
CVE-2026-8134 HIGH EPSS 1% → see advisory CVE-2026-8135 HIGH EPSS 0% → see advisory CVE-2026-81915 MEDIUM EPSS 0% → fixed in 9.5.3 CVE-2026-85385 CRITICAL EPSS 0% → fixed in 9.5.4 CVE-2026-18422 MEDIUM EPSS 0% → fixed in 9.5.3 CVE-2026-81925 MEDIUM EPSS 0% → fixed in 9.5.3 CVE-2026-85386 MEDIUM EPSS 0% → fixed in 9.5.4 CVE-2026-81917 MEDIUM EPSS 0% → fixed in 9.5.3 CVE-2026-81927 MEDIUM EPSS 0% → fixed in 9.5.3 CVE-2026-18119 CRITICAL EPSS 0% → fixed in 9.5.3 CVE-2026-81918 MEDIUM EPSS 0% → fixed in 9.5.3 CVE-2026-81895 HIGH EPSS 0% → fixed in 9.5.3 CVE-2026-8350 HIGH EPSS 0% → see advisory CVE-2026-81907 HIGH EPSS 0% → fixed in 9.5.3 CVE-2026-7886 MEDIUM EPSS 0% → fixed in 9.5.1 CVE-2026-18116 MEDIUM EPSS 0% → fixed in 9.5.3 CVE-2026-81916 MEDIUM EPSS 0% → fixed in 9.5.3 CVE-2026-18120 MEDIUM EPSS 0% → fixed in 9.5.4 CVE-2026-81900 MEDIUM EPSS 0% → fixed in 9.5.3 CVE-2026-6826 MEDIUM EPSS 0% → fixed in 9.5.1Other Concrete CMS versions
Check another release line of Concrete CMS.
Frequently asked
Is Concrete CMS 8.5.21 patched?
Concrete CMS 8.5.21 has 12 open critical-or-high vulnerabilities. The minimum safe version is 9.5.4 — upgrade to 9.5.4 or later to clear them.
What version should I upgrade Concrete CMS 8.5.21 to?
Upgrade Concrete CMS 8.5.21 to at least 9.5.4 to clear its 12 open critical-or-high vulnerabilities.
What is the latest version of Concrete CMS?
The latest supported Concrete CMS release is 9.5.4.
Is Concrete CMS 8.5.21 still receiving security updates?
Yes — the 8.5 line is still supported and receiving security updates. The latest release is 9.5.4.
Informational only, from public data (NVD · CISA KEV · EPSS · endoflife.date), and can lag or miss vendor-specific fixes. Always confirm against Concrete CMS's official advisory before you patch or upgrade — Concrete CMS official site ↗