GHSA-4pcg-pjp5-3mc6
Concrete CMS vulnerable to Reflected Cross-Site Scripting (XSS) in Conversation Messages Dashboard Page
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Packagist | concrete5/concrete5 | < 8.5.21 | 8.5.21 |
| Packagist | concrete5/concrete5 | >= 9.0.0RC1, < 9.4.3 | 9.4.3 |
Details
As written in the advisory (Markdown source, shown as plain text).
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.
References
External links from the advisory. They lead to third-party sites.
- https://nvd.nist.gov/vuln/detail/CVE-2025-8571
- https://github.com/concretecms/concretecms/commit/4b39dcc17c309dc82eb8398e8cdb146942f62f92
- https://github.com/concretecms/concretecms/commit/f7630b467d3a234d3d333ca117046a500e7ee2b6
- https://documentation.concretecms.org/9-x/developers/introduction/version-history/943-release-notes
- https://documentation.concretecms.org/developers/introduction/version-history/8521-release-notes
- https://github.com/concretecms/concretecms
- https://www.concretecms.org/download