CVE-2024-54149: Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework

Routine

HIGH 8.4UPGRADE

CVE-2024-54149 is a high-severity flaw (CVSS 8.4) affecting winter. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. Winter CMS prior to versions 1.2.7, 1.1.11, and 1.0.476 allow users with access to the CMS templates sections that modify Twig files to bypass the sandbox placed on Twig files and modify resources such as theme customisation values or modify, or remove, templates in the theme even if not provided direct access via the permissions. As all objects pass

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.4 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-184
Published	2024-12-09
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: wintercms

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-12-09 21:15 UTCPublished CVE record published
2026-06-17 08:09 UTCUpdated Record last modified

wintercms winter UPGRADE

Affected: < 1.0.476 · >= 1.1.0 and < 1.1.11 · >= 1.2.0 and < 1.2.7

Fixed in: 1.0.476, 1.1.11, 1.2.7

Safe to downgrade to: a release before 1.1.0

1. Check installed version

apt-cache policy winter || rpm -q winter || winter --version

2. UPGRADE to 1.0.476 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade winter

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade winter

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.1.0 (Debian / Ubuntu)

apt-cache madison winter sudo apt install winter=<VERSION_BEFORE_1.1.0> sudo apt-mark hold winter

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list winter sudo dnf downgrade winter-<VERSION_BEFORE_1.1.0> sudo dnf versionlock add winter

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-54149?

winter: upgrade to 1.0.476, 1.1.11, 1.2.7. Exact commands for each OS are on this page.

Is CVE-2024-54149 being exploited?

CVE-2024-54149 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-54149 affect?

CVE-2024-54149 affects winter. Severity is high (CVSS 8.4). Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. Winter CMS prior to versions 1.2.7, 1.1.11, and 1.0.476 allow users with access to the CMS templates sections that modify Twig files to bypass

How urgent is CVE-2024-54149?

Priority 38/100. High severity

Software pages

PHP vulnerabilities · Laravel vulnerabilities

Related CVEs

CVE-2026-22254 NONE 0.0 UPGRADE Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework
CVE-2024-29686 HIGH 7.2 DOWNGRADE Server-side Template Injection (SSTI) vulnerability in Winter CMS v.1.2.3 allows a remote attacker to execute

References

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