CVE-2026-3079 is a blind time-based SQL Injection vulnerability identified in the LearnDash LMS plugin for WordPress, specifically in the 'filters[orderby_order]' parameter used within the 'learndash_propanel_template' AJAX action. This vulnerability affects all versions up to and including 5.0.3. The root cause is insufficient sanitization and escaping of user-supplied input combined with inadequate preparation of the SQL query, allowing an authenticated attacker with Contributor-level privileges or higher to append arbitrary SQL commands to existing queries. Because the injection is blind and time-based, attackers can infer data by measuring response delays, enabling extraction of sensitive information from the backend database without direct visibility of query results. The attack vector requires network access to the WordPress site and valid credentials with at least Contributor privileges, but no user interaction is necessary. The vulnerability impacts the confidentiality of data stored in the LearnDash LMS database, potentially exposing user data, course information, or other sensitive records. No known public exploits have been reported yet, but the medium CVSS score of 6.5 reflects the moderate risk due to the required privileges and exploitation complexity. The vulnerability is classified under CWE-89, indicating improper neutralization of special elements in SQL commands. The lack of patches at the time of publication necessitates immediate attention from administrators to mitigate risk.

The primary impact of this vulnerability is unauthorized disclosure of sensitive information stored in the LearnDash LMS database. Attackers with Contributor-level access can leverage the SQL Injection flaw to extract confidential data such as user credentials, course content, or personal information, potentially leading to privacy violations and compliance issues. Although the vulnerability does not allow modification or deletion of data (no integrity or availability impact), the breach of confidentiality can undermine trust in the affected organizations and lead to reputational damage. Educational institutions, corporate training providers, and other organizations relying on LearnDash for e-learning management are at risk. The requirement for authenticated access limits the attack surface but does not eliminate risk, as Contributor accounts are commonly assigned to content creators or less-privileged users who may be compromised or malicious. The vulnerability could also be leveraged as a foothold for further attacks within the network. Given the widespread use of WordPress and LearnDash globally, the potential scale of impact is significant.

1. Immediate mitigation involves restricting Contributor-level and higher user permissions to trusted individuals only, minimizing the risk of insider threats or compromised accounts. 2. Implement Web Application Firewall (WAF) rules specifically designed to detect and block SQL Injection attempts targeting the 'filters[orderby_order]' parameter and the 'learndash_propanel_template' AJAX action. 3. Monitor logs for unusual query patterns or timing anomalies indicative of blind SQL Injection exploitation attempts. 4. Disable or restrict access to the vulnerable AJAX action if feasible until an official patch is released. 5. Encourage the vendor, StellarWP, to release a security update addressing proper input sanitization and prepared statements for the affected parameter. 6. Conduct regular security audits and penetration testing focusing on privilege escalation and injection vulnerabilities within the LMS environment. 7. Educate users with Contributor or higher roles about phishing and credential security to prevent account compromise. 8. Consider deploying database activity monitoring tools to detect abnormal query execution patterns. These steps go beyond generic advice by focusing on privilege management, targeted WAF rules, and proactive monitoring tailored to the specific vulnerability context.