CVE-2026-8139

Vulnerability Description

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 team gave this vulnerability a CVSS v.4.0 score of 2.0 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Drori (Tenzai) for reporting.

Related Weaknesses (CWE)

CWE-79

References

https://documentation.concretecms.org/9-x/developers/introduction/version-histor

FAQ

What is CVE-2026-8139?

CVE-2026-8139 is a documented vulnerability. 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 team gave this vulnerab...

How severe is CVE-2026-8139?

CVSS scoring is not yet available for CVE-2026-8139. Check NVD for updates.

Is there a patch for CVE-2026-8139?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.