CVE-2025-30055: System Function RCE Vulnerability

CVE-2025-30055 Overview

CVE-2025-30055 is a critical code injection vulnerability where the system function receives untrusted input from the user. When the EnableJSCaching option is enabled, attackers can execute arbitrary code by providing malicious input through the Module parameter. This vulnerability is classified under CWE-94 (Improper Control of Generation of Code / Code Injection).

Critical Impact

This vulnerability allows unauthenticated attackers on an adjacent network to execute arbitrary code with potential for complete system compromise, affecting confidentiality, integrity, and availability of both the vulnerable system and connected systems.

Affected Products

• Products utilizing the vulnerable system function with EnableJSCaching enabled
• Systems accepting user-controlled Module parameter input
• Applications with JavaScript caching functionality exposed to adjacent networks

Discovery Timeline

• 2025-08-27 - CVE CVE-2025-30055 published to NVD
• 2025-08-29 - Last updated in NVD database

Technical Details for CVE-2025-30055

Vulnerability Analysis

This code injection vulnerability stems from improper handling of user-supplied input in the system function. The vulnerability requires the EnableJSCaching configuration option to be active, which introduces a dangerous code execution path. When enabled, the application processes the Module parameter without adequate input validation or sanitization, allowing attackers to inject and execute arbitrary code.

The attack surface requires adjacent network access, meaning the attacker must be on the same network segment or have logical adjacency to the vulnerable system. While some attack prerequisites exist, no user interaction or authentication is required, making this vulnerability particularly dangerous in environments where adjacent network access is possible.

Root Cause

The root cause lies in the unsafe handling of the Module parameter value before it is passed to the system function. When JavaScript caching is enabled via the EnableJSCaching option, the application fails to properly sanitize or validate the Module parameter, treating user-supplied data as trusted input for code execution. This represents a fundamental violation of secure coding principles where external input should never be directly used in code execution contexts.

Attack Vector

The attack leverages adjacent network access to reach the vulnerable endpoint. An attacker positioned on the same network segment can craft a malicious request containing arbitrary code within the Module parameter. When the EnableJSCaching option is enabled, this malicious payload is processed by the system function, resulting in code execution.

The exploitation mechanism works as follows: the attacker submits a specially crafted Module parameter containing malicious code to the vulnerable application. Due to insufficient input validation, this code is processed by the system function, allowing the attacker to execute commands with the privileges of the application process. For detailed technical analysis, see the CERT Poland security advisory.

Detection Methods for CVE-2025-30055

Indicators of Compromise

• Unusual or unexpected values in Module parameter logs
• Anomalous process spawning from the application process
• Unexpected outbound network connections originating from the vulnerable service
• System command execution artifacts in application logs

Detection Strategies

• Monitor application logs for suspicious Module parameter values containing shell metacharacters or code patterns
• Implement network monitoring for unusual traffic patterns from systems running the vulnerable application
• Deploy endpoint detection to identify unexpected child processes spawned by the application
• Review authentication logs for unauthorized access attempts from adjacent network segments

Monitoring Recommendations

• Enable verbose logging for the affected application component to capture Module parameter values
• Configure alerts for system function calls with non-standard parameters
• Implement network segmentation monitoring to detect lateral movement attempts
• Monitor for changes to the EnableJSCaching configuration option

How to Mitigate CVE-2025-30055

Immediate Actions Required

• Disable the EnableJSCaching option if not strictly required for operations
• Implement network segmentation to restrict adjacent network access to vulnerable systems
• Apply strict input validation for the Module parameter
• Review and audit all instances where the vulnerable configuration is enabled

Patch Information

Consult the vendor for official patch availability. For additional context and technical details regarding this vulnerability, refer to the CERT Poland CVE-2025-2313 Analysis. Organizations should monitor vendor security advisories for patch releases addressing this code injection vulnerability.

Workarounds

• Disable EnableJSCaching to prevent exploitation through this attack vector
• Implement strict allowlist validation for the Module parameter
• Deploy web application firewall rules to filter malicious input patterns
• Restrict network access to the vulnerable service using firewall rules

# Configuration example - Disable vulnerable feature
# Disable JavaScript caching to mitigate the vulnerability
EnableJSCaching=false

# Implement network-level restrictions
# Restrict access to the vulnerable service from adjacent networks
iptables -A INPUT -p tcp --dport <service_port> -j DROP