UpHeron
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Servers and applications

CVE-2025-8571

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…

Severity
Medium 4.8
Published
5 Aug 2025
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
8.5.21, 9.4.3
Sources
NVD

Affected software

SoftwareAffected versions
Concrete CMSServers and applications · cpe:a:concretecms:concrete_cms
  • Every version before 8.5.21
  • From 9.0 before 9.4.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2025-8571
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2025-8571