Concrete CMS

Concrete CMS is an open-source content management system that has accumulated vulnerabilities across a modest but focused product portfolio, making it a well-represented player in the web application security landscape despite its narrow scope. The vendor's exposure centers on a characteristic web-application weakness profile: cross-site scripting, cross-site request forgery, improper input validation, and authorization bypass issues that arise from the challenges of sanitizing user content and managing session state in a self-hosted CMS. These classes reflect the vendor's role as a customizable platform where site builders integrate user-generated content and plugins, expanding the attack surface for injection and context-confusion flaws. Defenders deploying Concrete CMS should prioritize input validation hardening, session-cookie configuration review, and timely patching; current severity, exploitation activity, and exposure counts are shown alongside this summary.