Description
A Server-Side Template Injection issue was discovered in Crafter CMS 3.0.18. Attackers with developer privileges may execute OS commands by Creating/Editing a template file (.ftl filetype) that triggers a call to freemarker.template.utility.Execute in the FreeMarker library during rendering of a web page.
Remediation
References
https://github.com/craftercms/craftercms/issues/2677
https://medium.com/%40buxuqua/rce-vulnerability-in-crafter-cms-server-side-template-injection-19d8708ce242
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