CVE-2026-28136 in WP SMS Plugin
Summary
by MITRE • 02/26/2026
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in VeronaLabs WP SMS wp-sms allows SQL Injection.This issue affects WP SMS: from n/a through <= 6.9.12.
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Analysis
by VulDB Data Team • 02/26/2026
The vulnerability CVE-2026-28136 represents a critical SQL injection flaw within the VeronaLabs WP SMS plugin for WordPress systems. This security weakness manifests as improper neutralization of special elements within SQL commands, creating an avenue for malicious actors to execute unauthorized database operations. The vulnerability specifically impacts versions of the WP SMS plugin ranging from the initial release through version 6.9.12, indicating a substantial attack surface across multiple iterations of the software. The flaw resides in how the plugin processes user input when constructing SQL queries, failing to adequately sanitize or escape potentially malicious characters that could alter the intended query structure.
The technical implementation of this vulnerability stems from the plugin's insufficient input validation mechanisms during database interaction processes. When users submit data through the plugin's interface or API endpoints, the application fails to properly escape or parameterize special SQL characters such as single quotes, semicolons, or comment delimiters. This allows attackers to inject malicious SQL fragments that get executed within the database context, potentially enabling full database compromise. The vulnerability aligns with CWE-89, which categorizes SQL injection as a critical weakness in software systems, and represents a direct violation of secure coding practices for database interaction. Attackers could exploit this flaw to extract sensitive information, modify database records, or even escalate privileges within the affected system.
The operational impact of this vulnerability extends beyond simple data theft, as it can lead to complete system compromise and unauthorized access to sensitive user information. Database administrators may face unauthorized data exfiltration, including user credentials, personal information, and potentially financial data stored within the WordPress environment. The attack surface becomes particularly concerning given that WordPress remains one of the most widely deployed content management systems globally, making the WP SMS plugin a common target for automated scanning tools. This vulnerability can be exploited through various vectors including direct input manipulation, API endpoint exploitation, or through social engineering techniques that leverage the plugin's legitimate functionality to deliver malicious payloads.
Mitigation strategies should prioritize immediate plugin version updates to the latest secure release, as this vulnerability has likely been addressed in subsequent versions through proper input sanitization and parameterized query implementations. Organizations should implement comprehensive input validation measures at multiple layers, including web application firewalls and database-level protections, to prevent unauthorized SQL command execution. The remediation process should include thorough code review of all database interaction points, implementation of prepared statements and parameterized queries, and regular security audits of third-party plugins. Additionally, system administrators should monitor database logs for unusual query patterns and implement proper access controls to limit the impact of potential successful exploitation attempts. This vulnerability exemplifies the importance of following ATT&CK framework principles for defensive measures, particularly in the context of command and control operations where database compromise can enable further lateral movement within compromised environments.