Concrete5 · Concrete5 · CVE-2021-22958
**Name of the Vulnerable Software and Affected Versions**
concrete5 versions prior to 8.5.5
**Description**
A Server-Side Request Forgery issue was found that allows a decimal notation encoded IP address to bypass localhost limitations, enabling interaction with local services. The impact varies depending on the services exposed.
**Recommendations**
For versions prior to 8.5.5, update to version 8.5.5 or later to resolve the issue. As a temporary workaround, consider restricting access to local services to minimize the risk of exploitation.