CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
75.5%
The Snowboard framework in affected versions is vulnerable to prototype pollution in the main Snowboard class as well as its plugin loader.
This issue has been patched in https://github.com/wintercms/winter/commit/2a13faf99972e84c9661258f16c4750fa99d29a1 (for 1.2) and https://github.com/wintercms/winter/commit/bce4b59584abf961e9400af3d7a4fd7638e26c7f (for 1.1) and is available with Winter v1.1.10 and v1.2.1.
If you have not yet upgraded, or are using the 1.1 branch of Winter (1.1.8 or above), you can avoid this issue by following some common security practices for JavaScript, including implementing a content security policy and auditing your scripts.
The 1.0 branch of Winter is not affected, as it does not contain the Snowboard framework.
If you have any questions or comments about this advisory:
github.com/wintercms/winter
github.com/wintercms/winter/commit/2a13faf99972e84c9661258f16c4750fa99d29a1
github.com/wintercms/winter/commit/bce4b59584abf961e9400af3d7a4fd7638e26c7f
github.com/wintercms/winter/releases/tag/v1.1.10
github.com/wintercms/winter/releases/tag/v1.2.1
github.com/wintercms/winter/security/advisories/GHSA-3fh5-q6fg-w28q
nvd.nist.gov/vuln/detail/CVE-2022-39357