GHSA-q22j-5r3g-9hmh
October CMS safe mode bypass using Page template injection
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Packagist | october/system | >= 3.0.0, < 3.4.15 | 3.4.15 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
An authenticated backend user with the `editor.cms_pages`, `editor.cms_layouts`, or `editor.cms_partials` permissions who would normally not be permitted to provide PHP code to be executed by the CMS due to `cms.safe_mode` being enabled can craft a special request to include PHP code in the CMS template.
This is not a problem for anyone who trusts their users with those permissions to usually write & manage PHP within the CMS by not having `cms.safe_mode` enabled. Still, it would be a problem for anyone relying on `cms.safe_mode` to ensure that users with those permissions in production do not have access to write and execute arbitrary PHP.
### Patches
This issue has been patched in v3.4.15.
### Workarounds
As a workaround, remove the specified permissions from untrusted users.
### References
Credits to:
- [Vasiliy Bodrov](https://github.com/whatev3n)
### For more information
If you have any questions or comments about this advisory:
* Email us at [[email protected]](mailto:[email protected])
References
External links from the advisory. They lead to third-party sites.