MEDIUM

GHSA-mm5f-5rqw-574f

Concrete CMS has a stored Cross-site Scripting (XSS) vulnerability

Quick fix

GHSA-mm5f-5rqw-574f — concrete5/concrete5: upgrade to the fixed version with the command below.

composer require concrete5/concrete5:^9.4.8

Details

In Concrete CMS below version 9.4.8, A stored Cross-site Scripting (XSS) vulnerability exists in the search block where page names and content are rendered without proper HTML encoding in search results. This allows authenticated, rogue administrators to inject malicious JavaScript through page names that executes when users search for and view those pages in search results.

The Concrete CMS security team thanks zolpak for reporting.

Are you affected?

Enter the version of the package you're using.

Affected packages

Packagist/concrete5/concrete5

Introduced in: 0Fixed in: 9.4.8

Fixcomposer require concrete5/concrete5:^9.4.8

References

https://nvd.nist.gov/vuln/detail/CVE-2026-3244[ADVISORY]
https://github.com/concretecms/concretecms/pull/12826[WEB]
https://documentation.concretecms.org/9-x/developers/introduction/version-history/948-release-notes[WEB]
https://github.com/concretecms/concretecms[PACKAGE]