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Craft CMS has a potential RCE with a compromised security key

High severity GitHub Reviewed Published Jan 18, 2025 in craftcms/cms

Package

composer craftcms/cms (Composer)

Affected versions

>= 5.0.0-RC1, < 5.5.5
>= 4.0.0-RC1, < 4.13.8

Patched versions

5.5.8
4.13.8

Description

Impact

This is an RCE vulnerability that affects Craft 4 and 5 installs where your security key has already been compromised.

https://craftcms.com/knowledge-base/securing-craft#keep-your-secrets-secret

Anyone running an unpatched version of Craft with a compromised security key is affected.

Patches

This has been patched in Craft 5.5.8 and 4.13.8.

Workarounds

If you can't update to a patched version, then rotating your security key and ensuring its privacy will help to migitgate the issue.

References

craftcms/cms@e59e22b

References

@angrybrad angrybrad published to craftcms/cms Jan 18, 2025
Published by the National Vulnerability Database Jan 18, 2025
Published to the GitHub Advisory Database Jan 21, 2025
Reviewed Jan 21, 2025

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H

EPSS score

0.045%
(18th percentile)

Weaknesses

CVE ID

CVE-2025-23209

GHSA ID

GHSA-x684-96hh-833x

Source code

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