Description

Concrete CMS 9 to 9.4.2 and versions below 8.5.21 are vulnerable to Reflected Cross-Site Scripting (XSS) in the Conversation Messages Dashboard Page. Unsanitized input could cause theft of session cookies or tokens, defacement of web content, redirection to malicious sites, and (if victim is an admin), the execution of unauthorized actions. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Fortbridge https://fortbridge.co.uk/  for performing a penetration test and vulnerability assessment on Concrete CMS and reporting this issue.

INFO

Published Date :

2025-08-05T22:37:14.759Z

Last Modified :

2025-08-06T20:25:03.661Z

Source :

ConcreteCMS
AFFECTED PRODUCTS

The following products are affected by CVE-2025-8571 vulnerability.

Vendors Products
Concretecms
  • Concrete Cms
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-8571.

URL Resource
https://documentation.concretecms.org/9-x/developers/introduction/version-history/943-release-notes cve-icon cve-icon
https://documentation.concretecms.org/developers/introduction/version-history/8521-release-notes cve-icon cve-icon
https://www.concretecms.org/download cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact