dotCMS Shell Upload
Posted on 02 June 2022
When files are uploaded into dotCMS via the content API, but before they become content, dotCMS writes the file down in a temporary directory. In the case of this vulnerability, dotCMS does not sanitize the filename passed in via the multipart request header and thus does not sanitize the temporary file's name. This allows an attacker to use a specially crafted request to POST files to dotCMS via the ContentResource API that gets written outside of the dotCMS temporary directory. In the case of this exploit, an attacker can upload a specially crafted .jsp file to the webapp/ROOT directory of dotCMS which can allow for remote code execution.
