Bypass of CMS Safe Mode Security Feature
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 hello@wintercms.com
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | wintercms/winter | < 1.0.475, >= 1.1.0, < 1.1.9 | 1.0.475, 1.1.9 |
References
- Weakness (CWE)
-- Platform
- Composer
- Package
wintercms/winter- Disclosed
- 15.07.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-q37h-jhf3-85cj - CC BY 4.0
Vulnerability history: wintercms/winter
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 07.2022 03.2024
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- High 2
- Medium 1
- Low 1
Disclosures per year
- 2022: 2
- 2023: 1
- 2024: 1
- 2025: 0
- 2026: 0
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