CVE-2021-40098

9.8 criticalEPSS 1.6%

Critical (9.8) in concretecms concrete cms. EPSS 1.6% chance of exploitation in the next 30 days.

An issue was discovered in Concrete CMS through 8.5.5. Path Traversal leading to RCE via external form by adding a regular expression.

Severity

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 1.6% chance of exploitation in the next 30 days; higher than 76% of CVEs (scores of 2026-11-01)
CWE: CWE-22
Published: 2021-09-27
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19