GHSA-8c7c-h7px-267g

ghsaUSosv

Concrete CMS is vulnerable to IDOR in surveys

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

Concrete CMS 9.5.0 and below is vulnerable to IDOR in surveys. To be vulnerable, a site would have to be configured in such a way that both public and private surveys are present on the site. An unauthenticated attacker can vote in the restricted survey by submitting the restricted optionID through the public survey’s endpoint.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-8337US	medium5.3	0.19% (9th)	Exploit	2026-05-21
Concrete CMS 9.5.0 and below is vulnerable to IDOR in surveys. To be vulnerable, a site would have to be configured in such a way that both public and private surveys are present o…

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-2026-8337ADVISORY

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