🛡️ CVE-2026-7888
⚪ Unknown ✅ No Known Exploit CWE-502 NVD
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Concrete CMS below 9.5.2 is vulnerable to PHP Object Injection via unserialize() calls in the Workflow, Form block, and File/Set components that lack the allowed_classes restriction. An unauthenticated attacker may trigger arbitrary PHP object instantiation if a malicious serialized payload has been placed in the database. Thanks XananasX7 and Sanjorn Keeratirungsan (dizconnect) for both independently reporting. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 8.4 with vector CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N.

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE CWE-502
Public Exploit ✅ No
Source NVD
Published 2026-06-03
Updated 2026-06-05
Modified 2026-06-04
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown — —

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