October CMS Safe Mode bypass leads to authenticated Remote Code Execution
Published 13 Oct 2022 · Updated 8 Nov 2023
Affected packages
- Affected
- >=2.0.0 <2.2.34
- Fixed in
- 2.2.34
composer require october/system:^2.2.34- Affected
- >=3.0.0 <3.0.66
- Fixed in
- 3.0.66
composer require october/system:^3.0.66Details
Impact
This vulnerability only affects installations that rely on the safe mode restriction, commonly used when providing public access to the admin panel. Assuming an attacker has access to the admin panel and permission to open the "Editor" section, they can bypass the Safe Mode (cms.safe_mode) restriction to introduce new PHP code in a CMS template using a specially crafted request.
Patches
The issue has been patched in v2.2.34 and v3.0.66
References
Credits to:
- David Miller
For more information
If you have any questions or comments about this advisory:
- Email us at [hello@octobercms.com](mailto:hello@octobercms.com)
Is GHSA-x4q7-m6fp-4v9v in any of your client repos?
Checking one package by hand is fine. Checking it across forty client projects is not. NPMscan reads the lockfiles in every GitHub repo you pick, finds each project with an affected october/system, and gives you the command that fixes it.
References
Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.