MEDIUM

GHSA-8c7c-h7px-267g

Concrete CMS is vulnerable to IDOR in surveys

Quick fix

GHSA-8c7c-h7px-267g — concrete5/concrete5: upgrade to the fixed version with the command below.

composer require concrete5/concrete5:^9.5.1

Details

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

Packagist/concrete5/concrete5

Introduced in: 0Fixed in: 9.5.1

Fixcomposer require concrete5/concrete5:^9.5.1

References

https://nvd.nist.gov/vuln/detail/CVE-2026-8337[ADVISORY]
https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes[WEB]
https://github.com/concretecms/concretecms[PACKAGE]