CVE-2025-57320 in schema-editor-visual
Summary
by MITRE • 09/25/2025
json-schema-editor-visual is a package that provides jsonschema editor. A Prototype Pollution vulnerability in the setData and deleteData function of json-schema-editor-visual versions thru 1.1.1 allows attackers to inject or delete properties on Object.prototype via supplying a crafted payload, causing denial of service (DoS) as the minimum consequence.
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Analysis
by VulDB Data Team • 09/25/2025
The json-schema-editor-visual package presents a critical prototype pollution vulnerability identified as CVE-2025-57320 affecting versions through 1.1.1. This vulnerability stems from improper input validation within the setData and deleteData functions, which fail to adequately sanitize user-supplied data before processing. The flaw enables attackers to manipulate the Object.prototype directly by crafting malicious payloads that exploit the package's handling of JSON schema data structures. When these functions process untrusted input, they inadvertently allow property injection or deletion operations that propagate to the prototype chain, creating a fundamental security breach in the application's object model.
The technical implementation of this vulnerability occurs through the manipulation of JavaScript's prototype inheritance mechanism. Attackers can craft payloads that contain special characters or nested object structures which, when processed by the setData function, cause unintended property additions to Object.prototype. Similarly, the deleteData function can be exploited to remove critical properties from the prototype chain, leading to unpredictable application behavior. This prototype pollution affects the core JavaScript object model and can be leveraged to cause cascading failures throughout the application's execution environment. The vulnerability operates at the level of JavaScript's fundamental object manipulation capabilities, making it particularly dangerous as it can affect any code that relies on standard object properties or methods.
The operational impact of this vulnerability extends beyond simple denial of service conditions, though DoS represents the minimum consequence. When prototype pollution occurs, it can lead to more severe security implications including arbitrary code execution, information disclosure, and complete application compromise. The vulnerability affects applications that use json-schema-editor-visual for processing user input, as the malicious payloads can be injected through various data entry points. This creates a vector for attackers to escalate privileges or bypass security controls that depend on the integrity of JavaScript's object model. The vulnerability's impact is amplified in environments where the package is used to process untrusted data from web forms, API endpoints, or configuration files, as these inputs can be manipulated to exploit the prototype pollution mechanism.
Mitigation strategies for CVE-2025-57320 should prioritize immediate version updates to the latest available release of json-schema-editor-visual, as this vulnerability is likely to be addressed through proper input sanitization and prototype chain validation. Organizations should implement comprehensive input validation measures that sanitize all user-supplied data before processing, particularly when using the setData and deleteData functions. The implementation of prototype pollution prevention techniques such as freezing the Object.prototype or using secure object creation patterns can provide additional defense layers. Security teams should also consider implementing runtime monitoring to detect anomalous object property modifications and establish proper access controls to limit the impact of potential exploitation. From a compliance perspective, this vulnerability aligns with CWE-471, which addresses the improper handling of prototype pollution in software systems. The attack surface and potential for exploitation places this vulnerability in the ATT&CK framework under T1059.007 for script injection techniques and T1566 for social engineering via malicious input. Organizations should also consider implementing automated security scanning tools to detect vulnerable package versions and establish proper dependency management practices to prevent the use of insecure libraries in production environments.