GHSA-pcrh-gj77-j4mw

ghsaUSosv

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

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

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

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-8139US	medium5.4	0.15% (4th)	—	2026-05-21
Concrete CMS 9.5.0 and below is vulnerable to Stored XSS via external-link page cvName because updateCollectionAliasExternal bypasses being sanitized. The Concrete CMS security tea…

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-2026-8139ADVISORY

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