CVE-2022-39357

Name: CVE-2022-39357
Creator: NVD / NIST
Published: 2022-10-26T15:15:20.25+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.03%

Last modified Jun 17, 2026

CVE-2022-39357 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Winter is a free, open-source content management system based on the Laravel PHP framework. The Snowboard framework in versions 1.1.8, 1.1.9, and 1.2.0 is vulnerable to prototype pollution in the main Snowboard class as well as its plugin loader. EPSS estimates a 1.03% chance of exploitation in the next 30 days.

Description

Winter is a free, open-source content management system based on the Laravel PHP framework. The Snowboard framework in versions 1.1.8, 1.1.9, and 1.2.0 is vulnerable to prototype pollution in the main Snowboard class as well as its plugin loader. The 1.0 branch of Winter is not affected, as it does not contain the Snowboard framework. This issue has been patched in v1.1.10 and v1.2.1. As a workaround, one may avoid this issue by following some common security practices for JavaScript, including implementing a content security policy and auditing scripts.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.03%

59.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Wintercms	Winter	1.1.8
Wintercms	Winter	1.1.9
Wintercms	Winter	1.2.0

References

https://github.com/wintercms/winter/commit/2a13faf99972e84c9661258f16c4750fa99d29a1Patch, Third Party Advisory
https://github.com/wintercms/winter/commit/bce4b59584abf961e9400af3d7a4fd7638e26c7fPatch, Third Party Advisory
https://github.com/wintercms/winter/releases/tag/v1.1.10Release Notes, Third Party Advisory
https://github.com/wintercms/winter/releases/tag/v1.2.1Release Notes, Third Party Advisory
https://github.com/wintercms/winter/security/advisories/GHSA-3fh5-q6fg-w28qPatch, Third Party Advisory
https://github.com/wintercms/winter/commit/2a13faf99972e84c9661258f16c4750fa99d29a1Patch, Third Party Advisory
https://github.com/wintercms/winter/commit/bce4b59584abf961e9400af3d7a4fd7638e26c7fPatch, Third Party Advisory
https://github.com/wintercms/winter/releases/tag/v1.1.10Release Notes, Third Party Advisory
https://github.com/wintercms/winter/releases/tag/v1.2.1Release Notes, Third Party Advisory
https://github.com/wintercms/winter/security/advisories/GHSA-3fh5-q6fg-w28qPatch, Third Party Advisory

Timeline

Published: Oct 26, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-39357?

How severe is CVE-2022-39357?

CVE-2022-39357 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.03% probability of exploitation in the next 30 days.

How do I fix CVE-2022-39357?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-39357?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST