GHSA-2xp7-rpvc-pjwc

ghsaUSosv

Concrete CMS is vulnerable to IDOR

view advisory published 2026-05-22Licence: CC-BY-4.0

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.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-8239US	medium5.3OT elevated	0.19% (9th)	Exploit	2026-05-21
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 Con…

references

External citations — patches, advisories, analysis.

https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notesWEB
https://github.com/concretecms/concretecmsPACKAGE
https://nvd.nist.gov/vuln/detail/CVE-2026-8239ADVISORY

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