CVE-2026-11509: SQL Injection in CodeAstro Leave Management System 1.0

Technical summary

CVE-2026-11509 is a SQL injection vulnerability (CWE-89) affecting CodeAstro Leave Management System 1.0. The flaw exists in /admin/search_staff_for_updation.php where user-supplied input in the Name parameter is not properly sanitized before being used in SQL queries. The vulnerability also relates to improper input validation (CWE-74). Exploitation requires authentication (CVSS vector PR:L) and allows remote attackers to execute arbitrary SQL statements with the privileges of the application's database user. The CVSS 3.1 base score of 6.3 (Medium severity) reflects low attack complexity but limited scope and partial impact due to the authentication requirement.

Business impact

A successful exploitation could enable HR or administrative staff with malicious intent to bypass intended access controls and query or exfiltrate employee records, salary information, leave histories, or other confidential personnel data. The system's core function—managing employee leave requests—could be disrupted, leading to operational confusion and potential compliance violations if leave records are altered. For smaller organizations relying on this system as their primary leave management tool, data breach or integrity loss could affect payroll accuracy and employment record audits.

Affected systems

CodeAstro Leave Management System version 1.0 is confirmed affected. The vulnerability is specific to the /admin/search_staff_for_updation.php administrative interface. Organizations running this product should assess their deployment scope, particularly any internet-facing instances or those accessible to a broad internal user base. The vendor information and patch status have not been published in standard vulnerability repositories at this time.

Exploitability

Exploitation requires valid administrative or authenticated user credentials to access the /admin/search_staff_for_updation.php endpoint. The SQL injection itself is straightforward to execute once authenticated—typical payloads targeting UNION-based or time-based extraction would work given the low attack complexity. The barrier to exploitation is thus authentication, not technical sophistication. This makes the risk profile dependent on your organization's access controls and user management practices: insider threats and compromised accounts pose the primary realistic attack surface.

Remediation

Check CodeAstro's official website and advisory channels for a patched version of the Leave Management System. Apply all available security updates immediately. Additionally, implement input validation and parameterized queries (prepared statements) in the affected file to prevent SQL injection. If patches are unavailable, consider restricting network access to the /admin/ path and enforcing strict role-based access control to the staff search function. Audit recent database queries and exports to detect signs of exploitation.

Patch guidance

Verify the latest version available from CodeAstro and cross-reference the vendor's security advisories for confirmed patch details. Apply updates according to your change management process, testing in a non-production environment first. If using a hosted or SaaS deployment, check whether your provider has already deployed patches. For on-premises installations, prioritize patching within your standard vulnerability management timelines, treating this as a medium-priority remediation given the authentication requirement and medium CVSS score.

Detection guidance

Monitor database logs for unusual SQL syntax errors or unexpected query patterns originating from the Leave Management System application account. Review access logs for /admin/search_staff_for_updation.php for suspicious Name parameter values containing SQL keywords (UNION, SELECT, OR, --). Implement Web Application Firewall (WAF) rules to detect and block common SQL injection payloads targeting that endpoint. Query application audit logs for any unauthorized data access or export events. Conduct user access reviews to identify who has administrative credentials and whether those accounts show anomalous activity.

Why prioritize this

Although CVSS 3.1 scores this as Medium severity, the combination of authenticated access, direct data sensitivity (employee records), and simplicity of exploitation warrants timely attention. The vulnerability does not require complex exploitation or zero-day techniques—it is straightforward SQL injection that any developer-level attacker with valid credentials could execute. Organizations should prioritize patching based on their user population and insider threat posture; highly sensitive HR environments should treat this with elevated urgency.

Risk score, explained

The CVSS 3.1 score of 6.3 reflects: (1) Network-accessible attack vector, low attack complexity, and partial confidentiality, integrity, and availability impact raising the baseline; (2) requirement for prior authentication (PR:L) and unchanged attack scope (S:U) reducing the score from what an unauthenticated vulnerability would receive. The Medium severity designation appropriately captures that this is neither a critical remote code execution nor a negligible information disclosure—it is a meaningful data access risk that requires prompt but not emergency action.

Frequently asked questions