CVE-2021-40098

CRITICAL

Concrete CMS < 8.5.5 - Path Traversal and Remote Code Execution via External Form Regular Expression

Title source: llm
STIX 2.1

Description

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

References (2)

Core 2
Core References
Permissions Required, Third Party Advisory x_refsource_misc
https://hackerone.com/reports/1102080

Scores

CVSS v3 9.8
EPSS 0.0157
EPSS Percentile 72.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-22
Status published
Products (1)
concretecms/concrete_cms < 8.5.5
Published Sep 27, 2021
Tracked Since Feb 18, 2026