CVE-2026-12110: Taskbuilder WordPress Plugin SQL Injection Vulnerability Guide

Technical summary

CVE-2026-12110 is a SQL injection vulnerability in Taskbuilder versions up to 5.0.8, arising from insufficient input escaping on the 'task_search' parameter processed by the wppm_get_task_list AJAX handler. The vulnerability stems from two distinct security weaknesses: inadequate escaping of user-supplied input and lack of parameterized query preparation in the SQL statement. The AJAX handler compounds the issue by performing neither capability checks nor nonce verification, permitting any authenticated user to directly invoke it. An attacker with Subscriber-level access can craft malicious SQL payloads within the task_search parameter to extract unauthorized data from the database. This vulnerability is classified as CWE-89 (Improper Neutralization of Special Elements used in an SQL Command).

Business impact

Organizations relying on Taskbuilder for internal project management face immediate risk of unauthorized data disclosure. An attacker with even minimal account privileges can exfiltrate sensitive information such as task details, user data, project information, and potentially other database records depending on the database schema and permissions. This data exposure could result in competitive intelligence theft, exposure of confidential project timelines, or leakage of customer information if stored in the same database. The low barrier to exploitation—requiring only basic Subscriber account access—significantly increases the attack surface, as these accounts are often distributed more liberally than administrative accounts.

Affected systems

Taskbuilder – Project Management & Task Management Tool With Kanban Board plugin for WordPress is vulnerable in all versions up to and including 5.0.8. The plugin is active on WordPress installations where it has been installed and enabled, regardless of WordPress version. Verify your plugin version through the WordPress admin dashboard under Plugins to determine exposure.

Exploitability

This vulnerability has a CVSS 3.1 score of 6.5 (MEDIUM), reflecting high confidentiality impact but no integrity or availability impact. Exploitation requires network access and authentication, but the authentication bar is extremely low—any user with Subscriber-level access (the default minimum for registered users) can trigger the vulnerability without additional technical barriers. The vulnerability is unauthenticated from the standpoint of specialized credentials; no privilege escalation is needed beyond basic account creation. This combination makes exploitation straightforward for both internal threats and attackers who have compromised a low-privilege account. No exploit code or active in-the-wild exploitation is currently tracked in the KEV catalog, but the simplicity of crafting SQL injection payloads means weaponized proof-of-concept code could emerge quickly.

Remediation

Update the Taskbuilder plugin to a version newer than 5.0.8 immediately. Verify the latest patch version through the official WordPress plugin repository or the vendor's advisory. If an updated version is not yet available, consider temporarily disabling the plugin until a patch is released. Additionally, implement strict database user permissions to limit the scope of data that could be extracted through SQL injection, and audit database logs for suspicious query patterns. Monitor for authentication events from accounts with limited privileges accessing the wppm_get_task_list function.

Patch guidance

Check the WordPress Plugins dashboard for available updates to Taskbuilder. If an update to a version later than 5.0.8 is available, apply it immediately. Verify against the vendor's official security advisory or the WordPress plugin change log to confirm the update addresses this SQL injection vulnerability. If running on a critical system where downtime cannot be tolerated, stage the patch in a test environment first to confirm compatibility with your other plugins and custom configurations. After patching, confirm the plugin version in the dashboard and clear any cached plugin information.

Detection guidance

Monitor WordPress access logs and database query logs for unusual patterns in the wppm_get_task_list AJAX handler invocations. Look for requests with 'task_search' parameters containing SQL keywords such as UNION, SELECT, WHERE, OR, COMMENT sequences, or encoded equivalents. Database audit logs should be reviewed for unexpected SELECT queries or information_schema queries originating from the WordPress application user. Security plugins with SQL injection detection capabilities (such as Wordfence or Sucuri) may flag malicious task_search payloads if they include obvious SQL syntax. Enable detailed query logging in MySQL/MariaDB if not already active, and baseline normal task search patterns to identify anomalies.

Why prioritize this

This vulnerability merits prompt prioritization due to its combination of low exploitation barriers and significant confidentiality impact. Any authenticated user, including those with Subscriber status, can trigger the vulnerability without needing elevated privileges. The lack of capability checks or nonce verification in the vulnerable AJAX handler removes common WordPress security gates. While the CVSS score is MEDIUM, the practical risk is elevated because account compromise or insider threats with minimal privileges can immediately extract sensitive database content. Organizations should treat this as a near-term remediation target, especially if the Taskbuilder plugin is used in shared environments where Subscriber accounts are widely distributed.

Risk score, explained

The CVSS 3.1 score of 6.5 (MEDIUM) reflects: Attack Vector Network (AV:N) because the AJAX handler is remotely accessible; Attack Complexity Low (AC:L) because exploitation requires only standard SQL injection techniques; Privileges Required Low (PR:L) because Subscriber-level access is sufficient; User Interaction None (UI:N) because no user interaction is needed beyond the attacker's own request; Scope Unchanged (S:U) because only the WordPress database is affected; Confidentiality High (C:H) because arbitrary database content can be extracted; Integrity None (I:N) because the vulnerability does not allow data modification; Availability None (A:N) because it does not cause denial of service. The MEDIUM rating reflects that confidentiality is severely compromised but data integrity and service availability are not directly threatened. In practice, organizations should consider whether the sensitivity of their database content warrants treating this as a higher priority than the base score suggests.

Frequently asked questions