Concrete CMS 9.4.3 · Stored XSS
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Rated by Threat Radar
Data as of 14 Dec 2025, 18:09 UTC
What to do
AI-suggested
Organizations should prioritize upgrading Concrete CMS to a patched version once available. In the interim, implement strict input validation and output encoding on all user-submitted content to prevent malicious script injection. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. Regularly audit and sanitize existing content to remove any injected malicious code. Limit user permissions to reduce the risk of unauthorized content submission, and monitor logs for suspicious activities related to content creation or modification. Additionally, educate administrators and content creators about the risks of XSS and safe content management practices. Deploy web application firewalls (WAFs) configured to detect and block XSS payloads. Finally, maintain an incident response plan to quickly address any exploitation attempts.
Description
Concrete CMS 9.4.3 - Stored XSS