SQL Injection in Class and Exam Timetabling System Admin

A flaw has been found in SourceCodester Class and Exam Timetabling System 1.0. The impacted element is the function mysqli_query of the file /admin/modal_add_course1.php. This manipulation of the argument course causes sql injection. The attack may be initiated remotely. The exploit has been published and may be used.

Casky was already ahead

This CVE exploits attack patterns that Casky's 323matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

CVE-2026-86221 represents a critical SQL injection vulnerability in SourceCodester's Class and Exam Timetabling System version 1.0, specifically within the administrative course management function. The vulnerability exists in the /admin/modal_add_course1.php file where unsanitized user input from the 'course' parameter is directly passed to mysqli_query without proper escaping or parameterized queries. This allows attackers to manipulate SQL queries remotely, potentially leading to unauthorized data access, modification, or deletion of sensitive academic records. Educational institutions, training centers, and any organization using this timetabling system are immediately at risk, particularly since exploits are already publicly available and the system handles sensitive scheduling and student data.

Casky's 323 mapped security skills leverage Claude AI's extended reasoning to correlate this vulnerability across MITRE ATT&CK techniques TA0001 (Initial Access) and TA0043 (Reconnaissance). Practitioners using Casky would observe detection patterns identifying: (1) SQL injection attempts through the reconnaissance phase as attackers probe for injectable parameters in admin endpoints, and (2) actual exploitation attempts manifesting as malformed SQL queries in application logs. The platform's skills map to CWE-74 (Improper Neutralization of Special Elements in Output) and CWE-89 (SQL Injection), flagging suspicious query patterns, excessive database error responses, or unauthorized data exfiltration attempts. Security teams would receive findings highlighting the administrative path traversal combined with input validation failures, enabling rapid remediation through input sanitization, prepared statements, and access control hardening.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →

323 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-86221.

Abuse of Public-Facing API: Mobile API Abuse

mobile security · low

Run

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

MITRE ATT&CK Techniques

TA0001 TA0043

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