SQL Injection in Class and Exam Timetabling System User Deletion

A weakness has been identified in SourceCodester Class and Exam Timetabling System 1.0. Affected is an unknown function of the file /delete_user.php. This manipulation of the argument ID causes sql injection. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks.

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-2026-86209 exposes a critical SQL injection vulnerability in SourceCodester's Class and Exam Timetabling System version 1.0, specifically through the /delete_user.php endpoint's ID parameter. This weakness allows unauthenticated attackers to manipulate database queries remotely, potentially leading to unauthorized data access, modification, or deletion of student and faculty records. Educational institutions deploying this system face direct risk to sensitive personal information and operational data integrity. The public availability of exploit code significantly elevates the threat landscape, making this an urgent remediation priority for affected organizations.

Casky's 323 mapped security skills leverage Claude AI's extended reasoning to detect the attack patterns underlying this vulnerability across MITRE ATT&CK tactics TA0001 (Reconnaissance) and TA0043 (Reconnaissance). When analyzing this CVE, practitioners using Casky would identify: database query manipulation attempts in web application logs tied to CWE-89 (SQL Injection) patterns; suspicious parameter encoding in DELETE requests to /delete_user.php; and reconnaissance behavior (TA0001) where attackers probe the endpoint with SQLi payloads like ' OR '1'='1. The platform's skill correlation would surface detection opportunities including input validation bypass techniques, abnormal database access patterns, and privilege escalation attempts—enabling security teams to construct layered defenses that catch exploitation at multiple stages before unauthorized database modifications occur.

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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-2026-86209.

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

Investigate the attack patterns behind CVE-2026-86209

Casky has 323 skills that investigate the attack patterns behind CVE-2026-86209. Run one and get CVSS-scored findings in 3 minutes.

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