CVE-2025-68437: Craft CMS vulnerable to Server-Side Request Forgery (SSRF) via GraphQL Asset Upload Mutation

The Craft CMS GraphQL save_<VolumeName>_Asset mutation is vulnerable to Server-Side Request Forgery (SSRF). This vulnerability arises because the _file input, specifically its url parameter, allows the server to fetch content from arbitrary remote locations without proper validation. Attackers can exploit this by providing internal IP addresses or cloud metadata endpoints as the url, forcing the server to make requests to these restricted services. The fetched content is then saved as an asset, which can subsequently be accessed and exfiltrated, leading to potential data exposure and infrastructure compromise. This exploitation requires specific GraphQL permissions for asset management within the targeted volume.

Users should update to the patched 5.8.21 and 4.16.17 releases to mitigate the issue.References:

https://github.com/craftcms/cms/commit/013db636fdb38f3ce5657fd196b6d952f98ebc52

https://github.com/craftcms/cms/blob/5.x/CHANGELOG.md