CVE-2025-8571 (GCVE-0-2025-8571)
Vulnerability from cvelistv5
Published
2025-08-05 22:37
Modified
2025-08-06 20:25
Severity ?
4.8 (Medium) - 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
CWE
  • CWE-20 - Improper Input Validation
Summary
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.
References
ff5b8ace-8b95-4078-9743-eac1ca5451dehttps://documentation.concretecms.org/9-x/developers/introduction/version-history/943-release-notesRelease Notes
ff5b8ace-8b95-4078-9743-eac1ca5451dehttps://documentation.concretecms.org/developers/introduction/version-history/8521-release-notesRelease Notes
ff5b8ace-8b95-4078-9743-eac1ca5451dehttps://www.concretecms.org/downloadProduct
Impacted products
Vendor Product Version
Concrete CMS Concrete CMS Version: 9.0.0
Version: 5.6
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