# CVE-2021-21264: Bypass of fix for , Twig sandbox escape

Source: https://junglewise.ai/threats/cve-2021-21264-bypass-of-fix-for-twig-sandbox-escape  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-05-04  
License: CC BY 4.0 with a link back

CVE-2021-21264 · Severity: low · CVSS 3.1 · Published 2021-05-04

Bypass of fix for CVE-2020-26231, Twig sandbox escape

Technologies: [october/cms (Packagist)](https://junglewise.ai/threats/technologies/packagist-october-cms). Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is CVE-2021-21264 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2021-21264 being exploited in the wild.

**How severe is CVE-2021-21264?** Low severity, with a CVSS score of 3.1, published 4 May 2021.

**Which products and versions are affected?** october/cms (Packagist) ECOSYSTEM:introduced=1.0.471,fixed=1.0.472.

**Is there a fix for CVE-2021-21264?** Yes. october/cms (Packagist): upgrade to 1.0.472 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2021-21264?** Check whether you run october/cms (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- october/cms (Packagist): upgrade to 1.0.472 or later

  ```sh
  composer require october/cms:^1.0.472
  ```


## Affected products

- october/cms (Packagist) ECOSYSTEM:introduced=1.0.471,fixed=1.0.472

## Identifiers

- CVE-2021-21264
- GHSA-fcr8-6q7r-m4wg

## Related threats

- [Withdrawn Advisory: October Cross-site Scripting vulnerability](https://junglewise.ai/threats/cve-2023-43876-withdrawn-advisory-october-cross-site-scripting-vulnerability)
- [October CMS PHP Code Execution](https://junglewise.ai/threats/cve-2017-1000119-october-cms-php-code-execution)
- [Bypass of fix for , Twig sandbox escape](https://junglewise.ai/threats/cve-2020-26231-bypass-of-fix-for-twig-sandbox-escape)
- [Twig Sandbox Escape by authenticated users with access to editing CMS templates when safemode is enabled.](https://junglewise.ai/threats/cve-2020-15247-twig-sandbox-escape-by-authenticated-users-with-access-to-editing)
- [Local File Inclusion by unauthenticated users](https://junglewise.ai/threats/cve-2020-15246-local-file-inclusion-by-unauthenticated-users)