CVE-2025-23209

Known Exploited
Potential RCE with a compromised security key in craft/cms

Description

Craft is a flexible, user-friendly CMS for creating custom digital experiences on the web and beyond. This is an remote code execution (RCE) vulnerability that affects Craft 4 and 5 installs where your security key has already been compromised. Anyone running an unpatched version of Craft with a compromised security key is affected. This vulnerability has been patched in Craft 5.5.8 and 4.13.8. Users who cannot update to a patched version, should rotate their security keys and ensure their privacy to help migitgate the issue.

Category

8.0
CVSS
Severity: High
CVSS 3.1 •
EPSS 4.80% Top 15%
KEV Since 
Vendor Advisory github.com
Affected: craftcms cms
Published at:
Updated at:

References

Link Tags
https://github.com/craftcms/cms/security/advisories/GHSA-x684-96hh-833x vendor advisory
https://github.com/craftcms/cms/commit/e59e22b30c9dd39e5e2c7fe02c147bcbd004e603 patch
https://craftcms.com/knowledge-base/securing-craft#keep-your-secrets-secret product

Frequently Asked Questions

What is the severity of CVE-2025-23209?
CVE-2025-23209 has been scored as a high severity vulnerability.
How to fix CVE-2025-23209?
To fix CVE-2025-23209, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-23209 being actively exploited in the wild?
It is confirmed that CVE-2025-23209 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~5% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-23209?
CVE-2025-23209 affects craftcms cms.
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