CVE-2026-52021 in code100x
Summary
by MITRE • 08/21/2026
An issue in code100xDevs 100xdevs CMS v.1.0 (2026-04-30) allows a remote attacker to obtain sensitive information via the src/middleware.ts, and src/app/api/mobile/search/route.ts components.
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Analysis
by VulDB Data Team • 08/21/2026
The vulnerability identified in code100xDevs 100xdevs CMS version 1.0 represents a critical exposure of sensitive data resulting from insufficient input validation and improper error handling within the application's core middleware and API routing layers. This flaw specifically affects two distinct components: src/middleware.ts, which typically handles request preprocessing and authentication logic, and src/app/api/mobile/search/route.ts, which manages search-related API endpoints for mobile clients. The presence of this vulnerability indicates that the software fails to adequately sanitize or filter user-supplied input before processing it through these critical pathways, allowing a remote attacker to exploit misconfigurations or logical errors to extract confidential information from the system.
From a technical perspective, the exploitation vector likely involves manipulating HTTP requests directed at the search API endpoint or intercepting traffic processed by the middleware layer. In many modern web applications built with frameworks like Next.js, which is implied by the file structure src/app/api/, sensitive data such as database connection strings, internal service endpoints, authentication tokens, or user-specific details can be inadvertently exposed through verbose error messages, stack traces, or unfiltered response payloads. When an attacker sends malformed or specifically crafted requests to these components, the application may fail gracefully in production environments but instead returns detailed diagnostic information during development or due to misconfigured environment variables that leak internal state. This behavior aligns with CWE-209, which describes the generation of error messages containing sensitive information, and CWE-532, concerning exposure of log files to unauthorized users if logs are improperly secured alongside these endpoints.
The operational impact of this vulnerability is significant as it facilitates an Information Disclosure attack that can serve as a precursor to more severe compromises. By obtaining sensitive information through src/middleware.ts, an attacker might gain insights into the authentication mechanisms or session management strategies employed by the CMS. Similarly, exploitation of src/app/api/mobile/search/route.ts could reveal database schemas, query structures, or even direct access to underlying data stores if the search functionality is not properly isolated from administrative functions. This exposure undermines the confidentiality integrity and availability principles of information security, potentially allowing attackers to map out the internal network architecture, identify valid user credentials, or prepare for targeted attacks such as SQL injection or privilege escalation based on the leaked context.
This vulnerability maps directly to MITRE ATT&CK technique T1504, specifically Web Session Manipulation if session data is exposed via middleware errors, and more broadly to reconnaissance activities where attackers gather information about a target system before launching further exploits. The lack of proper abstraction between internal implementation details and external API responses violates fundamental security design principles outlined in OWASP guidelines regarding secure coding practices for web applications. It highlights the necessity of implementing strict input validation, output encoding, and comprehensive error handling strategies that do not reveal stack traces or internal configuration data to end-users or remote attackers.
To mitigate this vulnerability, immediate remediation steps should focus on hardening both the middleware and API route implementations. Developers must ensure that all user inputs are validated against expected formats using robust libraries rather than custom regex patterns where possible. Error handling mechanisms within src/middleware.ts and src/app/api/mobile/search/route.ts need to be reviewed to guarantee that generic, non-descriptive error messages are returned in production environments while detailed logs are stored securely server-side for administrative review only. Additionally, implementing Content Security Policy headers and restricting CORS origins can help limit the impact of any potential data leakage. Regular security audits and static code analysis tools should be integrated into the development pipeline to detect such exposure issues early in the lifecycle before deployment.