GHSA-q37h-jhf3-85cj Bypass of CMS Safe Mode Security Feature
Privileged users can bypass Safe Mode to modify PHP code in theme templates, enabling arbitrary code execution.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is GHSA-q37h-jhf3-85cj?
GHSA-q37h-jhf3-85cj is a vulnerability in wintercms/winter, published on 15 Jul 2022. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Impact
Authenticated users with permissions to create or modify theme template objects through the backend "CMS" editor can exploit this vulnerability to bypass the cms.enableSafeMode security feature if enabled (disables modification of PHP code through the web interface when enabled).
This is only an issue for Winter CMS instances that rely on the Safe Mode security feature to prevent privileged users from modifying the PHP code of CMS theme template objects through the web interface.
CVSS v3.1 Vector: AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Patches
Issue has been fixed in v1.0.475, v1.1.9, & v1.2.
Workarounds
Apply https://github.com/wintercms/storm/commit/03eb5ce3f2a271670574802b914f7bcaf07663c1 manually if unable to upgrade to v1.0.475, v1.1.9, or v1.2.0.
References
See https://github.com/octobercms/october/security/advisories/GHSA-79jw-2f46-wv22/.
Credit to David Miller for reporting the issue.
For more information
If you have any questions or comments about this advisory:
- Email us at [email protected]
Which versions are affected by GHSA-q37h-jhf3-85cj?
4 open source packages ship an affected version, including wintercms/winter.
| Package | Affected | Fixed in |
|---|---|---|
wintercms/winter Packagist | All versions | 1.0.475 |
wintercms/winter Packagist | All versions | 1.0.475 |
wintercms/winter Packagist | From 1.1.0 | 1.1.9 |
wintercms/winter Packagist | From 1.1.0 | 1.1.9 |
How do I fix GHSA-q37h-jhf3-85cj?
Upgrade wintercms/winter to a fixed version for your release line: 1.0.475 or 1.1.9.
Is GHSA-q37h-jhf3-85cj being exploited?
There is no known exploitation of GHSA-q37h-jhf3-85cj in the wild and no public exploit code.