CVE-2025-46096 is a security vulnerability identified in the solon framework, specifically version 3.1.2, involving the solon-faas-luffy component. The vulnerability is characterized as a directory traversal flaw that enables a remote attacker to perform cross-site scripting (XSS) attacks. Directory traversal vulnerabilities occur when an application fails to properly sanitize user-supplied input, allowing attackers to access files and directories outside the intended scope. In this case, the flaw can be exploited to inject malicious scripts into the application context, leading to XSS attacks. XSS vulnerabilities allow attackers to execute arbitrary JavaScript in the context of the victim's browser, potentially leading to session hijacking, credential theft, or the delivery of further malware. The solon-faas-luffy component appears to be a function-as-a-service (FaaS) related module within the solon framework, which is used for building Java applications. The lack of a CVSS score and absence of known exploits in the wild suggest this vulnerability is newly disclosed and may not yet be actively exploited. However, the combination of directory traversal and XSS in a remote attack vector indicates a significant risk if left unpatched. No patch or mitigation links are currently available, and the affected versions are not explicitly detailed beyond version 3.1.2. The vulnerability was reserved in April 2025 and published in June 2025, indicating recent discovery and disclosure.

For European organizations utilizing the solon framework, particularly version 3.1.2 with the solon-faas-luffy component, this vulnerability poses a risk of unauthorized access to sensitive files and the execution of malicious scripts within users' browsers. The impact on confidentiality includes potential exposure of sensitive configuration files or data through directory traversal. Integrity may be compromised if attackers inject malicious scripts that alter application behavior or data. Availability impact is less direct but could arise if injected scripts disrupt normal application operations or facilitate further attacks such as phishing or malware deployment. Organizations in sectors with high reliance on Java-based microservices or serverless architectures may be particularly vulnerable. Given the remote exploitation capability without authentication, attackers can target exposed endpoints over the internet, increasing the attack surface. The absence of known exploits currently limits immediate risk, but the vulnerability's nature suggests a high potential for exploitation once weaponized. This could lead to reputational damage, regulatory non-compliance (e.g., GDPR breaches due to data exposure), and operational disruptions.

1. Immediate code review and input validation: Organizations should audit the solon-faas-luffy component to ensure all user inputs are properly sanitized and validated to prevent directory traversal sequences (e.g., '../'). 2. Implement Content Security Policy (CSP): Deploy strict CSP headers to mitigate the impact of potential XSS attacks by restricting the execution of unauthorized scripts. 3. Isolate and restrict file system permissions: Limit the file system access rights of the solon application process to prevent unauthorized file reads outside designated directories. 4. Monitor and log access patterns: Implement enhanced logging and anomaly detection to identify unusual file access or script injection attempts. 5. Apply network-level protections: Use Web Application Firewalls (WAFs) with custom rules to detect and block directory traversal and XSS payloads targeting the solon-faas-luffy endpoints. 6. Stay updated on vendor patches: Maintain close monitoring of solon framework updates and apply security patches promptly once available. 7. Conduct penetration testing: Regularly test applications using solon for this specific vulnerability to identify and remediate exposure proactively.