What is CVE-2026-2994?

CVE-2026-2994 is a medium-severity vulnerability in Concrete Cms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.8/10. Published 2026-03-04.

How severe is CVE-2026-2994?

Medium severity. CVSS v3 base score is 6.8 out of 10.

CSRF in Concrete Cms

CVE-2026-2994

Concrete CMS below version 9.4.8 is subject to CSRF by a Rogue Administrator using the Anti-Spam Allowlist Group Configuration via group_id parameter which can leads to a security bypass since changes are saved prior to checking the CSRF token. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks z3rco for reporting

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2026-03-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (12.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Concrete Cms — versions 5
Concretecms Concrete Cms

Weakness classification (CWE)

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

References

ff5b8ace-8b95-4078-9743-eac1ca5451de (Exploit, Issue Tracking, Vendor Advisory)
ff5b8ace-8b95-4078-9743-eac1ca5451de (Patch, Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2026-2994?: CVE-2026-2994 is a medium-severity vulnerability in Concrete Cms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.8/10. Published 2026-03-04.
How severe is CVE-2026-2994?: Medium severity. CVSS v3 base score is 6.8 out of 10.