CVE-2026-15559 in Simple Online Leave Management System
Summary
by MITRE • 07/13/2026
A vulnerability was detected in CodeAstro Simple Online Leave Management System 1.0. This affects an unknown part of the file /SimpleOnlineLeave/admin/accept.php of the component POST Handler. Performing a manipulation of the argument appid results in sql injection. The attack is possible to be carried out remotely. The exploit is now public and may be used.
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Analysis
by VulDB Data Team • 07/13/2026
The vulnerability identified in CodeAstro Simple Online Leave Management System version 1.0 represents a critical sql injection flaw within the administrative component that processes post requests. This weakness exists in the accept.php file which handles application data submission through the POST method, specifically targeting the appid parameter that serves as an entry point for malicious input manipulation. The vulnerability stems from inadequate input validation and sanitization practices where user-supplied data flows directly into database queries without proper escaping or parameterization mechanisms.
The technical exploitation of this vulnerability occurs through remote code execution via sql injection attacks that leverage the appid parameter within the POST handler. Attackers can craft malicious payloads that manipulate the appid argument to inject arbitrary sql commands into the backend database operations. This allows unauthorized individuals to extract sensitive information from the database, modify existing records, or potentially gain full administrative control over the system. The vulnerability affects the entire application architecture since the accept.php file serves as a critical component in processing leave management requests and maintaining user data integrity.
The operational impact of this vulnerability extends beyond simple data compromise as it undermines the fundamental security posture of the leave management system. Remote exploitation capabilities mean that attackers can target the system from any location without requiring physical access or local network presence, making it particularly dangerous for organizations relying on web-based applications. The public availability of exploit code further amplifies the risk level, as it eliminates the need for sophisticated attack development and enables even less skilled threat actors to leverage this vulnerability effectively. Organizations using this system face potential data breaches involving employee leave records, personal information, and sensitive organizational data.
Security mitigations must address both immediate remediation and long-term architectural improvements to prevent similar vulnerabilities from occurring in future deployments. The primary fix involves implementing proper parameterized queries or prepared statements that separate sql command structure from user input data, thereby neutralizing injection opportunities. Input validation should be strengthened through whitelisting approaches that only accept expected data formats and ranges for the appid parameter while rejecting malformed inputs. Additionally, the application should implement proper error handling mechanisms that prevent information leakage through database errors and ensure that authentication and authorization checks are enforced at every access point. This vulnerability aligns with cwe-89 sql injection and represents a significant concern under the attack technique of command and control operations as outlined in the mitre att&ck framework. Organizations should consider implementing web application firewalls, regular security assessments, and comprehensive input sanitization measures to protect against similar vulnerabilities across their application portfolio.