// For flags

CVE-2020-26231

Bypass of fix for CVE-2020-15247, Twig sandbox escape

Severity Score

6.7
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. A bypass of CVE-2020-15247 (fixed in 1.0.469 and 1.1.0) was discovered that has the same impact as CVE-2020-15247. 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 470 (v1.0.470) and v1.1.1.

October es una plataforma CMS gratuita, de código abierto y autohosteada basada en Laravel PHP Framework. Se detectó un bypass de CVE-2020-15247 (corregido en versiones 1.0.469 y 1.1.0), que tiene el mismo impacto que CVE-2020-15247. Un usuario del backend autenticado con los permisos cms.manage_pages, cms.manage_layouts o cms.manage_partials que normalmente no podría proporcionar código PHP para ser ejecutado por el CMS debido a que cms.enableSafeMode está habilitado, puede escribir código Twig específico para escapar del sandbox de Twig y ejecutar PHP arbitrario. Esto no es un problema para cualquiera que confíe en sus usuarios con esos permisos para escribir y administrar PHP normalmente dentro del CMS al no tener cms.enableSafeMode habilitado, pero sería un problema para cualquiera que confíe en cms.enableSafeMode para asegurarse de que los usuarios con esos permisos en producción no tienen acceso para escribir y ejecutar PHP arbitrario. El problema se corrigió en Build 470 (versión v1.0.470) y versión v1.1.1

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
Low
Attack Vector
Local
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-10-01 CVE Reserved
  • 2020-11-23 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-862: Missing Authorization
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Octobercms
Search vendor "Octobercms"
 October
Search vendor "Octobercms" for product "October"
 1.0.469
Search vendor "Octobercms" for product "October" and version "1.0.469"
-
Affected
Octobercms
Search vendor "Octobercms"
 October
Search vendor "Octobercms" for product "October"
 1.1.0
Search vendor "Octobercms" for product "October" and version "1.1.0"
-
Affected