CVE-2026-42708 in WP Post Author Plugin
Summary
by MITRE • 10/07/2026
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in AF themes WP Post Author wp-post-author allows Blind SQL Injection.This issue affects WP Post Author: from n/a through 4.0.0.
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Analysis
by VulDB Data Team • 10/07/2026
The identified security flaw represents a classic instance of Improper Neutralization of Special Elements used in an SQL Command, commonly referred to as SQL injection. This vulnerability is present within the AF themes WP Post Author plugin for WordPress, specifically affecting versions ranging from n/a through 4.0.0. The core technical deficiency lies in the application's failure to properly sanitize or validate user-supplied input before incorporating it into database queries executed by the backend system. When an attacker constructs a malicious SQL statement and injects it via parameters handled by this plugin, the underlying database engine interprets these injected commands as legitimate instructions rather than data. This breakdown in separation between code and data allows for unauthorized interaction with the database infrastructure.
The specific manifestation of this vulnerability is categorized as Blind SQL Injection. Unlike error-based or union-based injection techniques where the application's response directly reveals information about the query execution, blind injection relies on indirect indicators to infer data. In a blind scenario, the attacker cannot see the direct results of their injected queries in the HTTP response body. Instead, they must deduce information by observing subtle differences in the application's behavior or timing responses based on boolean conditions or time delays introduced into the SQL payload. This method requires more sophisticated exploitation techniques and often involves automated tools to systematically probe database contents bit by bit, but it remains highly effective for extracting sensitive data when direct feedback is suppressed.
The operational impact of this vulnerability is severe due to the privileged nature of WordPress plugins which typically interact directly with the site's primary database containing user credentials, post content, configuration settings, and potentially other sensitive metadata. An attacker leveraging this blind SQL injection can perform unauthorized read operations to extract administrative usernames and password hashes, leading to full account compromise. Furthermore, depending on the specific capabilities enabled in the MySQL server version and its security configurations, an advanced attacker might escalate privileges to execute operating system commands or modify database structures. This compromises the confidentiality, integrity, and availability of the web application and any data it processes. The lack of immediate feedback makes detection by standard intrusion prevention systems more challenging, as the malicious traffic may appear similar to legitimate high-volume queries until specific patterns are identified through behavioral analysis.
To mitigate this risk, developers must implement strict input validation and parameterized queries for all database interactions involving user-supplied data. Parameterized statements ensure that the database engine distinguishes clearly between executable code and data values, rendering injection attempts harmless regardless of their content. Additionally, employing prepared statements with bound parameters is considered a best practice in secure coding standards such as those outlined by OWASP. For existing installations running vulnerable versions of WP Post Author, immediate remediation involves upgrading to a patched version where the input handling logic has been corrected. If an upgrade is not immediately feasible, implementing web application firewall rules that detect common SQL injection patterns can provide a layer of defense in depth. Regular security audits and static code analysis tools should also be integrated into the development lifecycle to identify similar vulnerabilities before deployment. This issue aligns with CWE-89 Improper Neutralization of Special Elements used in an SQL Command and is associated with MITRE ATT&CK technique T1059 Command and Scripting Interpreter when considering potential downstream impacts, though primarily it falls under data exfiltration vectors like T1005 Data from Local System.