CVE-2026-8239
Concrete CMS 9.5.0 and below is vulnerable to IDOR. The '/ccm/frontend/conversations/get_rating' endpoint confirms existence and returns rating score for any message by ID. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 6.3 with Vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N. Thanks Tristan Madani for reporting.
- Score
- CVSS 4.0 6.3 Medium
- Status
- Analyzed - ff5b8ace-8b95-4078-9743-eac1ca5451de
- Published
- 2026-05-21
- Last modified
- 2026-05-22
- Weaknesses
- CWE-862
Affected products
References
- https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes
