CVE-2026-56036 in 워드프레스 결제 심플페이 Plugin
Summary
by MITRE • 06/26/2026
Unauthenticated SQL Injection in 워드프레스 결제 심플페이 <= 5.5.6 versions.
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Analysis
by VulDB Data Team • 06/26/2026
This vulnerability affects the Simple Payment plugin for WordPress, specifically versions up to and including 5.5.6, where an unauthenticated sql injection flaw exists that allows remote attackers to execute arbitrary database queries without requiring any authentication credentials. The vulnerability stems from insufficient input validation and sanitization within the plugin's handling of user-supplied data, particularly in parameters used for database operations. Attackers can exploit this weakness by crafting malicious requests that inject SQL commands into the application's query execution flow, potentially leading to unauthorized data access, modification, or deletion.
The technical implementation of this vulnerability typically occurs when the plugin processes user input through GET or POST parameters without proper escaping or parameterization of database queries. This creates an environment where malicious SQL code can be interpreted and executed by the underlying database engine, bypassing normal authentication mechanisms and access controls. The flaw aligns with CWE-89 which specifically addresses SQL injection vulnerabilities, and represents a critical weakness in application security that enables attackers to manipulate database operations directly.
The operational impact of this vulnerability is severe as it allows threat actors to perform unauthorized actions against the affected WordPress installation's database. An attacker could extract sensitive information such as user credentials, payment records, or other confidential data stored within the database. Additionally, the vulnerability may enable attackers to modify or delete critical data, potentially disrupting business operations and compromising the integrity of payment processing functionality. The unauthenticated nature of this flaw means that no valid user credentials are required to exploit the vulnerability, making it particularly dangerous as it can be exploited by anyone with access to the affected website.
Organizations should immediately update their Simple Payment plugin to version 5.5.7 or later, which contains patches addressing this sql injection vulnerability. System administrators should also implement additional security measures including web application firewalls that can detect and block malicious sql injection attempts, input validation controls that sanitize all user-supplied data before database processing, and regular security monitoring to identify potential exploitation attempts. The vulnerability demonstrates the importance of maintaining current software versions and implementing defense-in-depth strategies as outlined in the mitre att&ck framework under the privilege escalation and credential access tactics. Organizations should also conduct comprehensive security assessments of their wordpress installations to identify similar vulnerabilities in other plugins or themes that may be susceptible to sql injection attacks due to inadequate input validation practices.