External risk intelligence

SPIP Remote Command Execution Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2024-8517

SPIP is a content management system designed to be deployed as a public-facing website. The vulnerability allows for unauthenticated remote code execution via a crafted HTTP request, targeting an interface that is intended to be accessible over the internet for standard web content delivery and user interaction.

OS Command Injection

Spip

4.0.0 to before 4.1.184.2.0 to 4.2.154.3.04.3.1

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

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical command injection vulnerability has been identified in SPIP software, allowing unauthenticated remote attackers to execute arbitrary operating system commands by sending a specially crafted file upload request. This type of vulnerability could potentially lead to unauthorized access and control over affected systems. The main concern is confirming relevance and exposure to the business.

Attackers can run any command on servers.
Unauthenticated remote code execution is a severe threat.
Confirm if SPIP is used and assess exposure.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by sending a specially crafted file upload request over the network to a vulnerable SPIP system. This request, targeting the multipart file upload feature, could lead to the execution of arbitrary operating system commands on the server.

No authentication or special access is needed.
Sending a malicious multipart file upload request.
Unauthenticated remote code execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an attacker to execute arbitrary commands on the server. This could occur when the system processes a specially crafted file upload request.

Server-side commands could be executed.
Attackers send malicious upload requests.
Full system compromise is possible.

Operational Fix

Recommended remediation, mitigation, and detection steps

This command injection vulnerability in SPIP affects remote and unauthenticated attackers, indicating a critical need for immediate action by teams responsible for managing web applications and their underlying infrastructure. The first practical step is to identify all instances of SPIP, determine their exposure and business criticality, and then locate the accountable owners to plan a risk-based remediation strategy.

Application owners should verify SPIP instances.
Confirm reachability and business criticality.
Plan immediate, risk-based remediation.

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 SPIP?

SPIP is a content management system used to build and manage public-facing websites. It provides tools for publishing articles, managing media, and handling site structure, making it a common choice for dynamic web content delivery.

What is the vulnerability in CVE-2024-8517?

This CVE is a command injection vulnerability (CWE-78). It means that the software fails to properly sanitize input, allowing an attacker to insert and execute their own operating system commands directly on the server hosting the website.

How does an attacker trigger this command injection?

An attacker triggers the bug by sending a specially crafted multipart HTTP request designed for file uploads. The vulnerability is tied specifically to this upload process; standard page views or interactions that do not involve uploading files do not initiate the command execution path.

Is my SPIP instance at risk?

According to Halo Surface Signal, this vulnerability is highly relevant because SPIP is intended to be internet-facing for web delivery. If your instance is reachable from the internet, it is exposed to unauthenticated remote attackers who do not need to log in to attempt this attack.

How should I respond to this SPIP security alert?

First, perform an inventory to locate all SPIP installations in your environment. Prioritize those that are internet-facing, assess their business criticality, and engage the system owners to apply the security updates provided by the SPIP project to remediate the flaw.

References

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.