CVE-2025-59055
BaseFortify
Publication date: 2025-09-11
Last updated on: 2025-09-24
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| instantcms | instantcms | to 2.17.3 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-918 | The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a blind Server-Side Request Forgery (SSRF) in InstantCMS up to version 2.17.3. It allows authenticated remote attackers to make arbitrary HTTP or HTTPS requests via the 'package' parameter in the installer functionality. This means attackers can make the server send requests to any website, including internal network services, without the server user knowing the details of the response.
How can this vulnerability impact me? :
The vulnerability can be exploited to scan the local network, call local services and their functions, conduct Denial of Service (DoS) attacks by exhausting server resources with many requests, and disclose the server's real IP address if it is behind a reverse proxy. These impacts can lead to unauthorized information disclosure, service disruption, and potential further attacks on internal systems.
What immediate steps should I take to mitigate this vulnerability?
Since no patched releases are available as of the publication date, immediate mitigation steps include restricting authenticated user access to the installer functionality, monitoring and limiting outgoing HTTP/HTTPS requests from the server, and implementing network-level controls to prevent unauthorized internal or external requests initiated by the application. Additionally, consider disabling or restricting the package parameter usage in the installer until a patch is released.