CVE-2026-108124 in wp-post-author Plugin
Summary
by MITRE • 10/09/2026
Improper neutralization of special elements used in an SQL command ('SQL injection') vulnerability in wp-post-author.
This issue affects wp-post-author before 4.1.0.
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Analysis
by VulDB Data Team • 10/09/2026
The identified security flaw represents a classic instance of improper neutralization of special elements within database queries, commonly known as SQL Injection. This vulnerability resides specifically within the wp-post-author plugin for WordPress, affecting all versions prior to release 4.1.0. The core technical issue stems from the application's failure to properly sanitize or parameterize user-supplied input before incorporating it into dynamic SQL statements executed against the backend database. In a typical web application architecture utilizing this plugin, data entered by users through forms, URL parameters, or HTTP headers is directly concatenated into query strings without adequate validation mechanisms such as prepared statements or rigorous escaping functions provided by the WordPress Database API.
From an operational perspective, this architectural weakness allows malicious actors to inject arbitrary SQL commands that are interpreted and executed by the database management system rather than being treated as literal data values. By crafting specific input payloads containing syntactically correct SQL fragments, an attacker can manipulate the logic of the original query. This capability enables a range of severe consequences including unauthorized access to sensitive information stored in the database, such as user credentials, personal identifiable information, and administrative configuration details. Furthermore, skilled attackers may leverage this vulnerability to modify or delete existing data records, potentially disrupting service availability or altering site functionality. In more complex attack scenarios involving specific database configurations like MySQL with file privileges enabled, it might even be possible to write files to the server's filesystem, leading to complete system compromise.
This type of flaw is formally categorized under Common Weakness Enumeration identifier CWE-89, which specifically addresses Improper Neutralization of Special Elements used in an SQL Command. The exploitation technique aligns with MITRE ATT&CK techniques related to Database Query Injection and potentially Data Exfiltration from the T1005 series if sensitive data is retrieved. It also relates to privilege escalation vectors if administrative functions are compromised through manipulated queries that bypass authentication checks or alter user roles directly within the database tables. The impact extends beyond immediate data loss, as successful exploitation can serve as a foothold for further lateral movement within the network infrastructure hosting the WordPress instance.
To mitigate this vulnerability and secure the environment against similar threats, it is imperative to upgrade wp-post-author to version 4.1.0 or later where these input handling mechanisms have been corrected. For organizations unable to immediately patch due to compatibility constraints, temporary mitigation strategies should include implementing a Web Application Firewall configured with rulesets specifically tuned to detect SQL injection patterns in HTTP requests targeting the plugin's endpoints. Additionally, enforcing strict principle of least privilege for database accounts used by the web application can limit the damage an attacker might cause even if exploitation occurs. Regular security audits and code reviews focusing on data flow analysis are recommended to identify other potential instances where user input interacts with backend systems without proper sanitization protocols in place.