CVE-2026-12582 Overview
CVE-2026-12582 affects the Library Management System WordPress plugin in versions prior to 3.5.8. The plugin fails to sanitize and escape a user-supplied parameter before using it in a SQL statement. Unauthenticated attackers can exploit this flaw to perform SQL injection and extract arbitrary data from the WordPress database, including user password hashes. The vulnerability is remotely exploitable over the network without authentication or user interaction.
Critical Impact
Unauthenticated attackers can extract user password hashes and other sensitive data from the WordPress database through SQL injection.
Affected Products
- Library Management System WordPress plugin versions before 3.5.8
- WordPress installations with the vulnerable plugin activated
- Any site exposing the vulnerable endpoint to the internet
Discovery Timeline
- 2026-07-13 - CVE-2026-12582 published to NVD
- 2026-07-13 - Last updated in NVD database
Technical Details for CVE-2026-12582
Vulnerability Analysis
The vulnerability is a classic SQL injection flaw [CWE-89] in the Library Management System WordPress plugin. The plugin accepts a user-supplied parameter and concatenates it directly into a SQL query without proper sanitization or escaping. Attackers can inject arbitrary SQL syntax to alter the intended query logic.
Because the vulnerable endpoint requires no authentication, any remote attacker can send crafted HTTP requests to trigger the flaw. Successful exploitation allows attackers to read arbitrary data from the database, including the wp_users table containing password hashes. Password hashes recovered from the database can be cracked offline to yield plaintext credentials for administrative accounts.
Root Cause
The root cause is missing input validation and lack of prepared statements. The plugin passes untrusted request input directly into a SQL query string rather than binding parameters through WordPress's $wpdb->prepare() API. This design allows attacker-controlled input to break out of the intended value context and become executable SQL.
Attack Vector
Exploitation occurs over the network against a vulnerable WordPress site. An attacker crafts an HTTP request with a malicious payload targeting the vulnerable parameter. Common payload patterns include UNION SELECT statements to exfiltrate rows from arbitrary tables and time-based blind techniques when responses do not directly echo query results. See the WPScan Vulnerability Report for additional technical details.
No verified public exploit code is currently referenced for this CVE. The vulnerability mechanism follows standard union-based and boolean-based SQL injection patterns against WordPress plugin endpoints.
Detection Methods for CVE-2026-12582
Indicators of Compromise
- HTTP requests to Library Management System plugin endpoints containing SQL keywords such as UNION, SELECT, SLEEP, or INFORMATION_SCHEMA
- Unusual outbound access to wp_users or other sensitive tables logged in database query logs
- Anomalous response sizes or response times indicating union-based or time-based blind SQL injection
- Web server access logs showing repeated requests with encoded quote characters (%27, %22) targeting plugin parameters
Detection Strategies
- Monitor web application firewall logs for SQL injection signatures targeting WordPress plugin request parameters
- Enable MySQL query logging and alert on queries referencing user_pass from unexpected sources
- Deploy WordPress security plugins that log and block SQL injection attempts against known vulnerable endpoints
- Correlate authentication anomalies, such as sudden administrative logins from new IP addresses, with prior injection attempts
Monitoring Recommendations
- Baseline normal request patterns to Library Management System plugin endpoints and alert on deviations
- Track failed and successful admin logins after suspected injection activity
- Review WordPress wp_users and wp_usermeta tables for unauthorized changes or new administrator accounts
How to Mitigate CVE-2026-12582
Immediate Actions Required
- Update the Library Management System WordPress plugin to version 3.5.8 or later without delay
- Rotate all WordPress user passwords, especially administrator accounts, after patching
- Review web server and database logs for evidence of prior exploitation attempts
- Deploy a WAF rule blocking SQL injection payloads targeting the vulnerable parameter until patching completes
Patch Information
Upgrade the Library Management System WordPress plugin to version 3.5.8 or later. The patched release adds proper sanitization and parameterized queries for the affected input. Refer to the WPScan Vulnerability Report for advisory details.
Workarounds
- Deactivate and remove the Library Management System plugin until an upgrade to 3.5.8 or later is possible
- Restrict access to WordPress admin and plugin endpoints by IP allowlist at the web server or WAF layer
- Enable a WordPress security plugin with SQL injection filtering to inspect and block malicious query parameters
- Enforce database least privilege so the WordPress database user cannot read tables beyond what the site requires
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
