CVE-2025-39569 Overview
CVE-2025-39569 is a blind SQL injection vulnerability in the Taskbuilder WordPress plugin. The flaw affects all versions of Taskbuilder up to and including 4.0.1. Authenticated attackers with low privileges can inject arbitrary SQL into database queries through improperly neutralized input parameters. The vulnerability is tracked under CWE-89 for improper neutralization of special elements in SQL commands.
The issue has a network attack vector and changed scope, meaning successful exploitation can affect resources beyond the vulnerable component. Patchstack published the advisory through its WordPress vulnerability database.
Critical Impact
Authenticated attackers can extract sensitive database contents, including user credentials and session data, via blind SQL injection against Taskbuilder versions through 4.0.1.
Affected Products
- Taskbuilder WordPress plugin versions through 4.0.1
- WordPress installations with Taskbuilder enabled
- Sites allowing low-privileged authenticated user access to plugin functionality
Discovery Timeline
- 2025-04-17 - CVE-2025-39569 published to NVD
- 2026-04-23 - Last updated in NVD database
Technical Details for CVE-2025-39569
Vulnerability Analysis
The vulnerability stems from improper neutralization of special characters passed into SQL statements within the Taskbuilder plugin. Attacker-controlled input reaches database query construction without parameterization or adequate sanitization. Because the responses do not directly return query data, exploitation follows a blind SQL injection pattern using boolean conditions or time-based payloads.
The attack requires low-privileged authentication but no user interaction. The scope is marked as changed, indicating that injected SQL can read or affect data outside the plugin's normal boundary, including core WordPress tables such as wp_users and wp_usermeta. Successful exploitation primarily impacts confidentiality, with limited availability impact and no direct integrity impact recorded.
Root Cause
The root cause is the construction of SQL queries through string concatenation with user-supplied input. The plugin fails to use prepared statements via $wpdb->prepare() or to apply appropriate sanitization functions such as esc_sql() and type-casting helpers before parameters reach the database layer.
Attack Vector
An authenticated attacker submits crafted parameters to a Taskbuilder endpoint that interacts with the database. The malicious payload alters the underlying query logic, allowing the attacker to infer database contents byte-by-byte using conditional responses or measurable response timing. The vulnerability is exploitable over the network without user interaction.
For detailed payload structure and affected endpoint information, see the Patchstack WordPress Vulnerability Report.
Detection Methods for CVE-2025-39569
Indicators of Compromise
- Unusual SELECT, UNION, SLEEP, or BENCHMARK patterns in WordPress query logs originating from Taskbuilder endpoints
- Authenticated requests from low-privileged accounts containing SQL meta-characters such as single quotes, comment sequences, or boolean tautologies
- Sustained sequences of requests with incrementally varying parameter values consistent with blind extraction
- Anomalous response time distributions for Taskbuilder request handlers indicating time-based injection
Detection Strategies
- Enable WordPress query logging or SAVEQUERIES in non-production environments to capture suspicious SQL patterns
- Deploy a web application firewall with rules tuned for blind SQL injection signatures against /wp-admin/admin-ajax.php and plugin REST routes
- Correlate authentication events with database error rates to flag accounts probing injection points
- Review plugin source for direct $wpdb->query() calls that incorporate request parameters without preparation
Monitoring Recommendations
- Forward WordPress access logs and database error logs to a centralized SIEM for pattern analysis
- Alert on bursts of HTTP 500 errors or repeated parameter mutations from a single authenticated session
- Monitor for outbound data exfiltration from web servers following injection attempts
How to Mitigate CVE-2025-39569
Immediate Actions Required
- Identify all WordPress sites running Taskbuilder version 4.0.1 or earlier and prioritize them for remediation
- Restrict access to authenticated Taskbuilder functionality to trusted user roles until a patched release is applied
- Rotate WordPress administrator passwords and database credentials if exploitation is suspected
- Deploy WAF rules blocking common blind SQL injection payloads targeting plugin endpoints
Patch Information
No fixed version is specified in the available advisory data beyond the affected range of "up to and including 4.0.1." Administrators should consult the Patchstack WordPress Vulnerability Report and the plugin vendor for the latest release that addresses CVE-2025-39569.
Workarounds
- Disable the Taskbuilder plugin until a patched version is installed
- Limit account creation and reduce the number of low-privileged users with access to plugin features
- Enforce strong authentication and rate limiting on /wp-login.php to slow credentialed reconnaissance
- Apply virtual patching at the WAF layer with signatures targeting SQL meta-characters in Taskbuilder parameters
# Example: temporarily deactivate the vulnerable plugin via WP-CLI
wp plugin deactivate taskbuilder
wp plugin status taskbuilder
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
