CVE-2020-15247 Twig Sandbox Escape by authenticated users with access to editing CMS templates when safemode is enabled.

2020-11-2319:35:14

CWE-862

GitHub_M

www.cve.org

5.2 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

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

5.8 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

12.7%

JSON

October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. In October CMS from version 1.0.319 and before version 1.0.469, an authenticated backend user with the cms.manage_pages, cms.manage_layouts, or cms.manage_partials permissions who would normally not be permitted to provide PHP code to be executed by the CMS due to cms.enableSafeMode being enabled is able to write specific Twig code to escape the Twig sandbox and execute arbitrary PHP. This is not a problem for anyone that trusts their users with those permissions to normally write & manage PHP within the CMS by not having cms.enableSafeMode enabled, but would be a problem for anyone relying on cms.enableSafeMode to ensure that users with those permissions in production do not have access to write & execute arbitrary PHP. Issue has been patched in Build 469 (v1.0.469) and v1.1.0.

CNA Affected

[
  {
    "product": "october",
    "vendor": "octobercms",
    "versions": [
      {
        "status": "affected",
        "version": ">= 1.0.319, < 1.0.469"
      }
    ]
  }
]