CVE-2026-96329 in Opt-In Builder Plugin
Summary
by MITRE • 10/09/2026
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in tagDiv tagDiv Opt-In Builder td-subscription allows Blind SQL Injection.This issue affects tagDiv Opt-In Builder: from n/a through 1.7.6.
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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 used within an SQL command, commonly categorized under the CWE-89 vulnerability class known as SQL injection. This specific weakness manifests in the tagDiv Opt-In Builder plugin for WordPress, particularly affecting versions ranging from n/a through 1.7.6. The core technical issue lies in the application's failure to adequately sanitize or validate user-supplied input before incorporating it into backend database queries. When a system processes data without proper encoding or parameterization, an attacker can manipulate the structure of SQL statements executed by the underlying database management system. In this specific context, the vulnerability is characterized as blind SQL injection, which implies that the application does not return direct error messages or query results to the user interface based on the injected payload. Instead, the attacker must infer data extraction or command execution success through indirect means such as response time variations, conditional logic changes in page content, or other side-channel indicators.
From an operational perspective, blind SQL injection poses a significant risk because it allows for the unauthorized access, modification, or deletion of sensitive database contents without immediate detection by standard monitoring tools that rely on visible error outputs. An attacker can systematically extract data from the WordPress installation's database, which typically contains user credentials, personal information collected via opt-in forms, and potentially administrative session tokens. The ability to perform blind extraction means that even if the application appears stable and unresponsive to malicious input, it is still leaking information bit by bit through boolean-based or time-based techniques. This can lead to full account compromise of administrator users, exposure of subscriber data violating privacy regulations such as GDPR or CCPA, and potentially further lateral movement within the hosting environment if database credentials are reused elsewhere.
The technical mechanism behind this vulnerability likely involves a lack of prepared statements or insufficient escaping of special characters like single quotes in input fields processed by the td-subscription component. When these inputs are concatenated directly into SQL strings rather than being passed as parameters to pre-compiled queries, the database engine interprets malicious syntax as part of the command logic. This aligns with MITRE ATT&CK technique T1059.004, which covers Command and Scripting Interpreter usage via SQL injection, although in this blind scenario, it is more accurately mapped to data exfiltration techniques where information is gathered through inference rather than direct execution of system commands. The absence of robust input validation allows the attacker to inject logical operators that alter query outcomes based on true or false conditions regarding database content.
Mitigation strategies must prioritize immediate remediation by updating the tagDiv Opt-In Builder plugin to a version newer than 1.7.6, where this vulnerability has been addressed through improved code sanitization and parameterized queries. In environments where patching is not immediately feasible, defensive measures should include deploying Web Application Firewalls configured with rulesets capable of detecting SQL injection patterns in POST or GET parameters associated with the subscription forms. Additionally, implementing strict input validation that rejects unexpected characters and enforcing least-privilege database accounts for web applications can limit the blast radius if an exploit attempt succeeds. Regular security audits and static code analysis focused on data flow to SQL endpoints are recommended to prevent similar improper neutralization issues in future development cycles.