CVE-2026-48882 Overview
CVE-2026-48882 is a SQL Injection vulnerability affecting the WP Time Slots Booking Form WordPress plugin in versions up to and including 1.2.50. The flaw allows authenticated users with Subscriber-level privileges to inject SQL statements into database queries through unsanitized input. The vulnerability is classified under CWE-89 for Improper Neutralization of Special Elements used in an SQL Command. Successful exploitation can expose sensitive WordPress database contents and disrupt site availability. The issue was published to the National Vulnerability Database (NVD) on June 15, 2026.
Critical Impact
Authenticated subscribers can extract data from the WordPress database and trigger limited availability impact on affected sites running WP Time Slots Booking Form <= 1.2.50.
Affected Products
- WP Time Slots Booking Form plugin for WordPress
- All plugin versions <= 1.2.50
- WordPress sites permitting Subscriber-level registration with the plugin installed
Discovery Timeline
- 2026-06-15 - CVE-2026-48882 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2026-48882
Vulnerability Analysis
The vulnerability resides in WP Time Slots Booking Form <= 1.2.50, where user-supplied input reaches a SQL query without proper sanitization or parameterization. An attacker holding a Subscriber account can craft requests that alter the structure of database statements executed by the plugin. The scope is changed because the injected SQL operates on the shared WordPress database used by other components and users.
The Patchstack advisory documents the issue as a confirmed SQL Injection in the plugin code path accessible to low-privilege authenticated users. Confidentiality impact is high, while integrity remains unaffected and availability impact is limited. WordPress sites that allow open user registration expose this attack surface to any internet user willing to create a subscriber account.
The EPSS data lists a probability of 0.332% with a percentile of 24.844 as of June 18, 2026.
Root Cause
The root cause is improper neutralization of special elements used in an SQL command [CWE-89]. The plugin concatenates request parameters into SQL statements rather than using prepared statements with bound parameters through the WordPress $wpdb->prepare() API. As a result, attacker-controlled values modify the intended query logic.
Attack Vector
The attack vector is network-based. An attacker authenticates as a Subscriber, then sends an HTTP request to the vulnerable plugin endpoint containing crafted SQL syntax in the affected parameter. The injected payload is concatenated into the active SQL query and executed against the WordPress database. No user interaction beyond the attacker's own request is required.
No public proof-of-concept exploit is referenced in the available data. Technical details are documented in the Patchstack SQL Injection Vulnerability advisory.
Detection Methods for CVE-2026-48882
Indicators of Compromise
- Unexpected SQL syntax such as UNION SELECT, SLEEP(, INFORMATION_SCHEMA, or comment sequences (--, /*) in HTTP request parameters destined for WP Time Slots Booking Form endpoints.
- Web server access logs showing Subscriber-authenticated requests to plugin endpoints with abnormally long query strings or encoded SQL keywords.
- Database error messages or query timeouts originating from the plugin's PHP files in WordPress debug logs.
Detection Strategies
- Inspect WordPress access logs for requests by low-privilege accounts that target plugin AJAX or admin-ajax handlers associated with WP Time Slots Booking Form.
- Enable a web application firewall (WAF) ruleset that flags SQL Injection patterns and review blocked or anomalous events for the vulnerable endpoints.
- Audit recently created Subscriber accounts and correlate registration timestamps with suspicious plugin requests.
Monitoring Recommendations
- Forward WordPress, web server, and database logs to a centralized SIEM or data lake for correlation across authentication, plugin, and query telemetry.
- Alert on spikes in wp_options, wp_users, or wp_usermeta read patterns that may indicate database exfiltration through injection.
- Monitor plugin file integrity and any unexpected modification to the WP Time Slots Booking Form installation directory.
How to Mitigate CVE-2026-48882
Immediate Actions Required
- Update WP Time Slots Booking Form to a version higher than 1.2.50 as published by the plugin vendor through the Patchstack advisory.
- Disable or remove the plugin on sites that cannot be patched promptly and that do not require booking functionality.
- Review the WordPress user list and remove untrusted Subscriber accounts created before remediation.
Patch Information
Refer to the Patchstack SQL Injection Vulnerability advisory for the fixed plugin version and upgrade guidance. Apply the update through the WordPress plugin manager or by replacing the plugin directory with the patched release.
Workarounds
- Restrict user registration on the affected WordPress site to trusted users until the plugin is updated.
- Deploy WAF rules that block SQL Injection patterns targeting plugin endpoints and admin-ajax.php actions tied to WP Time Slots Booking Form.
- Enforce least privilege on the WordPress database user so the application cannot read or modify tables outside its required scope.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
