CVE-2026-3781: 
WordPress vulnerability analysis and mitigation

CVE-2026-3781 is a SQL Injection vulnerability in the Attendance Manager plugin for WordPress, affecting all versions up to and including 0.6.2. The flaw exists in the attmgr_off parameter due to insufficient input escaping and lack of proper SQL query preparation, allowing authenticated attackers with Subscriber-level access or higher to extract sensitive information from the database. It was published on April 8, 2026, and assigned by Wordfence. The vulnerability carries a CVSS v3.1 base score of 5.4 (Medium) (Wordfence, ENISA EUVD).

The root cause is classified as CWE-89 (Improper Neutralization of Special Elements used in an SQL Command). The vulnerable code resides in the plugin's class-form.php file (lines 142 and 148), where the attmgr_off parameter is passed into an SQL query without adequate escaping or use of prepared statements. An authenticated attacker with at minimum Subscriber-level access can append malicious SQL clauses to the existing query via a crafted network request, enabling blind or union-based SQL injection to enumerate and extract database contents (Wordfence, WordPress Trac).

Successful exploitation allows authenticated low-privileged users (Subscriber and above) to extract sensitive information from the WordPress database, including user credentials, personal data, and site configuration. While availability is not directly impacted, the integrity of data may be affected through SQL manipulation. The attack requires no user interaction and is conducted entirely over the network, making it accessible to any registered site user (Wordfence, ENISA EUVD).

No public exploit code or active in-the-wild exploitation has been reported for CVE-2026-3781 as of the latest available data. The EPSS score is approximately 0.023%, indicating a low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. No threat actor attribution has been identified (Wordfence).

1. Reconnaissance: Identify WordPress sites running the Attendance Manager plugin version 0.6.2 or earlier using tools like WPScan or Shodan with WordPress fingerprinting.
2. Authentication: Register or obtain a low-privileged account (Subscriber level or above) on the target WordPress site.
3. Identify vulnerable parameter: Locate the functionality in the Attendance Manager plugin that processes the attmgr_off parameter, typically accessible via a form or AJAX request handled by class-form.php.
4. Craft SQL injection payload: Append a malicious SQL clause to the attmgr_off parameter value (e.g., using UNION-based or blind time-based techniques) to probe the database structure.
5. Extract data: Use iterative SQL injection payloads to enumerate database tables, columns, and extract sensitive data such as WordPress user hashes, email addresses, or plugin-stored records (Wordfence, WordPress Trac).

• Network: Unusual or repeated HTTP requests to WordPress endpoints associated with the Attendance Manager plugin containing SQL metacharacters (e.g., ', --, UNION, SELECT) in the attmgr_off parameter.
• Logs: WordPress or web server access logs showing requests with encoded or plaintext SQL syntax in the attmgr_off query parameter; error logs showing MySQL query errors related to malformed SQL.
• Database: Unexpected or anomalous database queries logged in MySQL slow query or general query logs originating from the WordPress application user, particularly involving UNION or subquery patterns.

Users should update the Attendance Manager plugin to version 0.6.3 or later, which addresses the SQL injection vulnerability by implementing proper input escaping and prepared statements. As an interim measure, site administrators can restrict plugin access to trusted users only or temporarily disable the plugin until patching is feasible. No configuration-based workaround fully mitigates the risk without updating the plugin (Wordfence, ENISA EUVD).