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GHSA-h6jm-f4hh-fw27medium6.6

October CMS has Safe Mode Bypass via Twig Database Write Operations

Impact

A vulnerability was identified in the Twig sandbox security policy that allowed database write operations when cms.safe_mode is enabled. Backend users with Developer permissions could use Twig template markup to execute insert, update, and delete operations on any database table through the query builder, which is included in the sandbox allow-list.

Source excerpt · OSV
Applies when

Impact

  • Arbitrary database writes including modification or deletion of any table
  • Requires authenticated backend access with Developer permissions
  • Only relevant when cms.safe_mode is enabled (otherwise direct PHP injection is already possible)

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

october/october Packagist
Affected rangeRecorded fix
Earlier releases before 3.7.14Ecosystem versions3.7.14
From 4.0.0 before 4.1.10Ecosystem versions4.1.10

Version evidence: OSV · GHSA-h6jm-f4hh-fw27

View original version evidence (261 explicit versions)

Original source description

A vulnerability was identified in the Twig sandbox security policy that allowed database write operations when cms.safe_mode is enabled. Backend users with Developer permissions could use Twig template markup to execute insert, update, and delete operations on any database table through the query builder, which is included in the sandbox allow-list.

Impact

  • Arbitrary database writes including modification or deletion of any table
  • Requires authenticated backend access with Developer permissions
  • Only relevant when cms.safe_mode is enabled (otherwise direct PHP injection is already possible)

Patches

The vulnerability has been patched in v3.7.14 and v4.1.10. Write operations such as insert, update, delete, and truncate are now blocked on query builder and model objects within the Twig sandbox. All users are encouraged to upgrade to the latest patched version.

Workarounds

If upgrading immediately is not possible:

  • Restrict Developer tool access to fully trusted administrators only

Reporter

References