External risk intelligence

Crafter Studio Directory Traversal Leading to RCE

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2017-15681

Crafter CMS is a web-based content management system. As a web application platform, it is commonly deployed as a public-facing service to manage and deliver web content, making it a likely target for exposure on the public internet.

Path Traversal

Craftercms Crafter Cms

3.0.0 to before 3.0.1

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A directory traversal vulnerability in Crafter Studio could allow unauthenticated attackers to overwrite operating system files, potentially leading to remote code execution. This issue affects Crafter CMS versions 3.0.0 through 3.0.1.

Attackers can overwrite system files.
Confirms relevance and exposure to this risk.
Assess potential impact on critical systems.

Attack Path

How an attacker could exploit the issue

An unauthenticated attacker can exploit a directory traversal vulnerability in Crafter Studio to overwrite system files, potentially leading to remote code execution. This attack path begins with network access to the vulnerable component, followed by a carefully crafted request that tricks the application into accessing files outside its intended directory.

Network access required.
Directory traversal via crafted requests.
Risk of remote code execution.

Live Threat

Current exploitation, exposure, and threat context

A directory traversal vulnerability in Crafter Studio could allow unauthenticated attackers to overwrite operating system files, potentially leading to remote code execution. This could affect the integrity and availability of the underlying operating system when the software is deployed in a network-accessible environment.

Operating system files.
Unauthenticated network access.
System compromise or takeover.

Operational Fix

Recommended remediation, mitigation, and detection steps

The unauthenticated file overwrite vulnerability in Crafter Studio's directory traversal can lead to Remote Code Execution, making it critical for teams managing the Crafter CMS application. The first practical step is to identify all instances of Crafter Studio, assess their exposure and business criticality, locate the accountable owner, and then plan remediation based on this risk assessment.

Application owners should manage this issue.
Verify if Crafter Studio is exposed externally.
Plan remediation during the next maintenance window.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is Crafter CMS?

Crafter CMS is a web-based content management system platform used to build, manage, and deliver dynamic web content. It functions as a server-side application that organizations deploy to serve their websites and digital experiences to users, serving as the central engine for content creation and publishing workflows.

How does CVE-2017-15681 work?

This vulnerability is classified as a path traversal issue, technically known as CWE-22. It occurs when an application fails to properly sanitize input, allowing a user to move outside of the designated folder structure. In the context of this CVE, it enables an attacker to manipulate file paths to overwrite critical operating system files, which can eventually allow them to execute unauthorized code.

Do I need to be logged in to trigger this bug?

No, this vulnerability does not require authentication. An attacker can initiate the attack through the network without having a valid user account. The vulnerability is triggered by sending specially crafted requests to the application. It is not triggered by standard, legitimate interaction with the web interface, as it requires specific input designed to escape the expected directory boundaries.

Is my Crafter Studio instance at risk?

According to Halo Surface Signal, Crafter CMS is often deployed as a public-facing service, which significantly increases the likelihood that your instance is exposed to internet-based threats. If your deployment is accessible from the public internet rather than restricted to a private internal network, it is at a much higher risk of being reached by an external attacker attempting to exploit this vulnerability.

When should I prioritize fixing this?

You should begin by creating an inventory of all your Crafter Studio instances to determine which are currently running affected versions. Once identified, evaluate their network exposure and business impact. Given the risk of remote code execution, work with the system owners to prioritize these instances for remediation and schedule the necessary updates during your next available maintenance window.

References

crafter.com/

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.