CVE-2025-64318 is a vulnerability classified under CWE-1427, which pertains to improper neutralization of input used for LLM prompting within Salesforce Mulesoft Anypoint Code Builder. This vulnerability allows an attacker to manipulate writable configuration files by injecting crafted input that is not properly sanitized before being used in prompts to the integrated Large Language Model. The affected product versions are all releases prior to 1.12.1. The flaw arises because the input used to generate prompts for the LLM is not adequately neutralized, enabling malicious input to alter configuration files that control the behavior of the Code Builder environment. This can lead to unauthorized changes in configuration, potentially affecting the integrity of the development environment or automated code generation processes. The CVSS v3.1 base score is 5.3 (medium severity), with an attack vector of network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and impact limited to integrity (I:L) without affecting confidentiality or availability. No public exploits or active exploitation have been reported. The vulnerability was reserved on 2025-10-30 and published on 2025-11-04. Since the vulnerability affects a development tool used to build and deploy integrations and APIs, its exploitation could have downstream effects on applications and services relying on these configurations.

For European organizations, the primary impact of CVE-2025-64318 lies in the potential unauthorized modification of configuration files within the Mulesoft Anypoint Code Builder environment. This can undermine the integrity of development and deployment processes, potentially leading to the introduction of malicious code, misconfigurations, or altered integration workflows. While confidentiality and availability are not directly impacted, the integrity compromise can cascade into broader security risks if altered configurations lead to insecure deployments or operational disruptions. Organizations heavily reliant on Mulesoft for API management and integration may face increased risk of supply chain attacks or operational inconsistencies. Given the network-exploitable nature and lack of required privileges, the vulnerability could be leveraged by remote attackers to target development environments, which are often less hardened than production systems. This risk is particularly relevant for European enterprises in sectors such as finance, telecommunications, and manufacturing, where Mulesoft is commonly used for critical integration tasks.

To mitigate CVE-2025-64318, organizations should immediately update Mulesoft Anypoint Code Builder to version 1.12.1 or later, where the vulnerability has been addressed. In addition to patching, organizations should implement strict input validation and sanitization controls on any inputs used for LLM prompting or configuration management within development tools. Access to writable configuration files should be tightly controlled using role-based access controls and monitored for unauthorized changes. Employing file integrity monitoring solutions can help detect unexpected modifications to configuration files. Network segmentation and limiting exposure of development environments to untrusted networks can reduce the attack surface. Security teams should also audit existing configurations and deployment pipelines for signs of tampering. Finally, educating developers and DevOps personnel about secure handling of inputs and configuration management best practices will help prevent exploitation of similar vulnerabilities in the future.