Impact
Affected versions of Winter CMS allow users with access to the CMS Asset Manager were able to upload SVGs without automatic sanitization.
To actively exploit this security issue, an attacker would need access to the Backend with a user account with the following permission: cms.manage_assets
The Winter CMS maintainers strongly recommend that the cms.manage_assets permission only be reserved to trusted administrators and developers in general.
Patches
Sanitization of SVG assets is now applied automatically when uploading through the CMS Asset Manager.
This security issue has been fixed as of wintercms/winter@8a7f74b.
Workarounds
If users cannot upgrade, they may apply commit wintercms/winter@8a7f74b to their Winter CMS installation manually to resolve this issue.
References
iamunixtz Reporter
Impact
Affected versions of Winter CMS allow users with access to the CMS Asset Manager were able to upload SVGs without automatic sanitization.
To actively exploit this security issue, an attacker would need access to the Backend with a user account with the following permission:
cms.manage_assetsThe Winter CMS maintainers strongly recommend that the
cms.manage_assetspermission only be reserved to trusted administrators and developers in general.Patches
Sanitization of SVG assets is now applied automatically when uploading through the CMS Asset Manager.
This security issue has been fixed as of wintercms/winter@8a7f74b.
Workarounds
If users cannot upgrade, they may apply commit wintercms/winter@8a7f74b to their Winter CMS installation manually to resolve this issue.
References