SB2021050301 - Twig sandbox bypass in October CMS
Published: May 3, 2021
Security Bulletin ID
SB2021050301
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Code Injection (CVE-ID: CVE-2021-21264)
The vulnerability allows a remote user to execute arbitrary PHP code on the target system.
The vulnerability exists due to incomplete patch implementation for previously patched vulnerabilities #VU48707 and #VU48710. A remote authenticated user with the cms.manage_pages, cms.manage_layouts, or cms.manage_partials permissions can write specific Twig code to escape the Twig sandbox and execute arbitrary PHP.
Remediation
Install update from vendor's website.