CVE-2021-22968 – concrete5/core

Package

Manager: composer
Name: concrete5/core
Vulnerable Version: >=0 <8.5.7

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

EPSS: 0.02666 pctl0.85234

Details

Improper file handling in concrete5/core A bypass of adding remote files in Concrete CMS (previously concrete5) File Manager leads to remote code execution in Concrete CMS (concrete5) versions 8.5.6 and below. The external file upload feature stages files in the public directory even if they have disallowed file extensions. They are stored in a directory with a random name, but it's possible to stall the uploads and brute force the directory name. You have to be an admin with the ability to upload files, but this bug gives you the ability to upload restricted file types and execute them depending on server configuration. To fix this, a check for allowed file extensions was added before downloading files to a tmp directory

Metadata

Created: 2021-11-23T17:54:26Z
Modified: 2023-06-30T20:31:40Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/11/GHSA-g3p2-hfqr-9m25/GHSA-g3p2-hfqr-9m25.json
CWE IDs: ["CWE-330", "CWE-98"]
Alternative ID: GHSA-g3p2-hfqr-9m25
Finding: F061
Auto approve: 1