What is CVE-2026-8415?

CVE-2026-8415 is a high-severity vulnerability in Concrete Cms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2026-05-21.

How severe is CVE-2026-8415?

High severity. CVSS v3 base score is 8.8 out of 10.

CSRF in Concrete Cms

CVE-2026-8415

Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/dialog/express/association/reorder. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4…

Vulnerability class: CSRF (Cross-Site Request Forgery)

EPSS: 0.000 (5.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Concrete Cms — versions 9.0
Concretecms Concrete_cms

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)
CWE-1275

References

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

Frequently asked questions

What is CVE-2026-8415?: CVE-2026-8415 is a high-severity vulnerability in Concrete Cms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2026-05-21.
How severe is CVE-2026-8415?: High severity. CVSS v3 base score is 8.8 out of 10.