LOW

GHSA-pcrh-gj77-j4mw

Concrete CMS is vulnerable to Stored XSS via external-link page cvName

Details

Concrete CMS 9.5.0 and below is vulnerable to Stored XSS via external-link page cvName because updateCollectionAliasExternal bypasses being sanitized.

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Affected packages

Packagist / concrete5/concrete5

Introduced in: 0 Fixed in: 9.5.1

Fix composer require concrete5/concrete5:^9.5.1

References

https://nvd.nist.gov/vuln/detail/CVE-2026-8139 [ADVISORY]
https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes [WEB]
https://github.com/concretecms/concretecms [PACKAGE]