medium4.8
CVE-2025-8571
Concrete CMS vulnerable to Reflected Cross-Site Scripting (XSS) in Conversation Messages Dashboard Page
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | concrete5/concrete5 | < 8.5.21 | 8.5.21 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Concretecms | Concrete Cms | before 8.5.21 from 9.0 before 9.4.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- 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://www.concretecms.org/download
- https://github.com/advisories/GHSA-4pcg-pjp5-3mc6
- https://nvd.nist.gov/vuln/detail/CVE-2025-8571
- https://github.com/concretecms/concretecms/commit/4b39dcc17c309dc82eb8398e8cdb146942f62f92
- https://github.com/concretecms/concretecms/commit/f7630b467d3a234d3d333ca117046a500e7ee2b6