CVE-2023-3203 in MStore API Plugin
Summary
by MITRE • 06/14/2023
The MStore API plugin for WordPress is vulnerable to Cross-Site Request Forgery due to missing nonce validation on the mstore_update_limit_product function. This makes it possible for unauthenticated attackers to update limit the number of product per category to use cache data in home screen via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
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Analysis
by VulDB Data Team • 04/10/2026
The vulnerability identified as CVE-2023-3203 affects the MStore API plugin for WordPress, which is a popular mobile commerce solution that enables businesses to create and manage mobile applications for their online stores. This particular flaw resides within the mstore_update_limit_product function, which is designed to control how many products are displayed per category on the home screen of mobile applications. The issue stems from the absence of proper nonce validation, a critical security mechanism that verifies the authenticity of requests originating from legitimate administrators. This omission creates a significant security gap that can be exploited by malicious actors seeking to manipulate the caching behavior of product displays within the mobile application interface.
The technical nature of this vulnerability places it squarely within the category of Cross-Site Request Forgery attacks as defined by CWE-352, where an attacker can trick authenticated users into executing unwanted actions on a web application. In this specific case, the vulnerability allows unauthenticated attackers to manipulate the caching parameters that control how many products are displayed per category on the mobile home screen. The attacker would need to craft a forged request that targets the vulnerable mstore_update_limit_product endpoint and then convince a site administrator to perform an action that triggers this request, typically through social engineering techniques such as clicking on malicious links or visiting compromised websites. This attack vector requires minimal privileges from the attacker since they don't need to authenticate to the WordPress admin panel directly, but rather exploit the trust relationship between the administrator and the vulnerable plugin.
The operational impact of this vulnerability extends beyond simple data manipulation as it can significantly affect the performance and user experience of mobile commerce applications. By altering the product limit parameters, attackers can potentially cause cache pollution, leading to inefficient resource utilization and degraded application performance. The manipulation of cache data on the home screen can result in inconsistent product displays, which may confuse customers and potentially impact sales conversion rates. Additionally, this vulnerability can be leveraged as a stepping stone for more sophisticated attacks, as demonstrated by the ATT&CK framework's methodology for privilege escalation and lateral movement. The ability to modify caching behavior could also be used to create conditions that facilitate other attacks or to mask malicious activities by altering the normal application behavior patterns that administrators might monitor for security incidents.
Mitigation strategies for CVE-2023-3203 should focus on immediate remediation through plugin updates from the vendor, as this vulnerability is likely to be addressed in subsequent releases with proper nonce validation implementation. Organizations should also implement network-level monitoring to detect unusual patterns in API requests targeting the mstore_update_limit_product endpoint, particularly those originating from unexpected sources or occurring outside normal business hours. Security administrators should conduct thorough review of user permissions and implement additional access controls for API endpoints that modify critical application configuration parameters. The principle of least privilege should be enforced by ensuring that only authorized administrators can access and modify caching settings, while also implementing multi-factor authentication for administrative accounts. Regular security audits of WordPress plugins should be conducted to identify other potential vulnerabilities, and organizations should maintain up-to-date vulnerability management processes that include monitoring for new CVEs affecting their WordPress environments. This vulnerability serves as a reminder of the importance of proper input validation and authentication mechanisms in web applications, particularly when dealing with configuration changes that can significantly impact application behavior and performance.