CVE-2026-3452
Concrete CMS below version 9.4.8 is vulnerable to Remote Code Execution by stored PHP object injection into the Express Entry List block via the columns parameter. An authenticated administrator can store attacker-controlled serialized data in block configuration fields that are later passed to unserialize() without class restrictions or integrity checks. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 8.9 with vector CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H. Thanks YJK ( @YJK0805 https://hackerone.com/yjk0805 ) of ZUSO ART https://zuso.ai/ for reporting.
- Affected products
- Concrete Cms
- Concretecms Concrete Cms
- < 9.4.8
- Fix
- Available
- CVSS 4.0
- 8.9 HIGH
- CVSS 3.1
- 7.2 HIGH
- EPSS
- 0.6% (46th percentile)
- Weakness
- CWE-502
- NVD status
- Analyzed
- Published
- 2026-03-04
- Attack patterns
- CAPEC-253
No indexed exploits for CVE-2026-3452 yet
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No exploit for CVE-2026-3452 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.