CVE-2025-4318 in Amplify Studio
Summary
by MITRE • 05/05/2025
The AWS Amplify Studio UI component property expressions in the aws-amplify/amplify-codegen-ui package lack input validation. This could potentially allow an authenticated user who has access to create or modify components to run arbitrary JavaScript code during the component rendering and build process.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 06/10/2025
The vulnerability identified as CVE-2025-4318 resides within the aws-amplify/amplify-codegen-ui package, specifically targeting the AWS Amplify Studio UI component property expressions. This flaw represents a critical security weakness that undermines the integrity of the component rendering and build processes. The vulnerability stems from insufficient input validation mechanisms within the code generation system, creating an attack surface where maliciously crafted property expressions can be executed without proper sanitization. The affected environment allows authenticated users with component creation or modification privileges to exploit this weakness, transforming what should be a controlled development process into a potential vector for arbitrary code execution. This type of vulnerability directly impacts the security posture of applications built using AWS Amplify Studio, as it enables attackers to inject malicious JavaScript code that executes during both the build and rendering phases of component development.
The technical implementation of this vulnerability manifests through the improper handling of user-supplied input within component property expressions. When developers or administrators create or modify UI components through Amplify Studio, the system processes these property expressions without adequate validation or sanitization. This oversight allows attackers to inject malicious JavaScript code that gets executed during the code generation process, potentially leading to full system compromise. The vulnerability aligns with CWE-74, which addresses injection flaws, and specifically relates to CWE-94, which covers improper control of generation of code. The flaw operates at the intersection of code generation and input processing, where user-provided data flows directly into executable code without proper security controls. The attack vector is particularly dangerous because it leverages legitimate administrative privileges, making detection more challenging and the potential impact more severe.
The operational impact of CVE-2025-4318 extends beyond simple code execution, potentially enabling attackers to gain unauthorized access to sensitive data, modify application behavior, or even establish persistent backdoors within the Amplify environment. During the component build process, malicious code injection could result in compromised source code generation, leading to downstream security issues throughout the application lifecycle. The vulnerability affects the entire Amplify Studio ecosystem, particularly impacting organizations that rely heavily on visual development tools and automated code generation workflows. This weakness can be exploited to perform privilege escalation attacks, as authenticated users can manipulate the build process to execute code with elevated permissions. The implications for continuous integration and deployment pipelines are significant, as compromised code generation processes can affect multiple environments and deployments simultaneously.
Mitigation strategies for CVE-2025-4318 should focus on implementing robust input validation and sanitization mechanisms within the amplify-codegen-ui package. Organizations should immediately update to patched versions of the aws-amplify/amplify-codegen-ui package to address the vulnerability. Additionally, implementing strict access controls and principle of least privilege should be enforced, limiting component creation and modification privileges to only essential personnel. Security monitoring should be enhanced to detect anomalous code generation patterns that might indicate exploitation attempts. The implementation of content security policies and runtime code analysis can provide additional layers of protection against malicious code injection. Organizations should also consider implementing automated code review processes that can detect and flag potentially dangerous property expressions before they are processed. This vulnerability serves as a reminder of the critical importance of input validation in code generation systems, aligning with ATT&CK technique T1059.007 for JavaScript and with the broader category of code injection attacks that target automated development environments.