CVE-2025-23209 on CISA KEV

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

01What CISA says about this vulnerability

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…

02Required action — verbatim from CISA

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

03Notes & references

• github.com — https://github.com/craftcms/cms/security/advisories/GHSA-x684-96hh-833x
• github.com — https://github.com/craftcms/cms/commit/e59e22b30c9dd39e5e2c7fe02c147bcbd004e603
• craftcms.com — https://craftcms.com/knowledge-base/securing-craft#keep-your-secrets-secret

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

Vendor	Product	Versions
craftcms	cms	>= 5.0.0-RC1, < 5.5.5, >= 4.0.0-RC1, < 4.13.8

06Detection

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection:

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