Craft CMS contains an external control of assumed-immutable web parameter vulnerability. This vulnerability could allow an unauthenticated client to introduce arbitrary values, such as PHP code, to a known local file location on the server. This vulnerability could be chained with CVE-2024-58136 as represented by CVE-2025-32432.

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

https://github.com/craftcms/cms/commit/e59e22b30c9dd39e5e2c7fe02c147bcbd004e603