What is CVE-2026-8245?

CVE-2026-8245 is a medium-severity vulnerability in Concrete Cms, classified under Improper Neutralization of Script in Attributes in a Web Page. CVSS score: 5.4/10. Published 2026-05-21.

How severe is CVE-2026-8245?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Concrete Cms

CVE-2026-8245

Concrete CMS 9.5.0 and below is vulnerable to Reflected XSS in Legacy Pagination via HTML attribute injection. Concrete\Core\Legacy\Pagination builds pagination links by raw-interpolating its $URL field into href="" (<a href="{$linkURL}" ……

EPSS: 0.000 (6.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Concrete Cms — versions 5.0
Concretecms Concrete_cms

Weakness classification (CWE)

CWE-83 — Improper Neutralization of Script in Attributes in a Web Page

References

ff5b8ace-8b95-4078-9743-eac1ca5451de (release-notes, Release Notes)

Frequently asked questions

What is CVE-2026-8245?: CVE-2026-8245 is a medium-severity vulnerability in Concrete Cms, classified under Improper Neutralization of Script in Attributes in a Web Page. CVSS score: 5.4/10. Published 2026-05-21.
How severe is CVE-2026-8245?: Medium severity. CVSS v3 base score is 5.4 out of 10.