SQL Injection in Class and Exam Timetabling System

A vulnerability has been found in SourceCodester Class and Exam Timetabling System 1.0. The affected element is an unknown function of the file /preview4.php. Such manipulation of the argument course_year_section leads to sql injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

Casky was already ahead

This CVE exploits attack patterns that Casky's 322matched 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-2026-13527 is a critical SQL injection vulnerability affecting SourceCodester Class and Exam Timetabling System version 1.0, specifically in the /preview4.php file where the course_year_section parameter fails to sanitize user input. This vulnerability carries a CVSS score of 7.3 (high severity) and can be exploited remotely without authentication, making it particularly dangerous for educational institutions and organizations relying on this timetabling system. Attackers can manipulate database queries to extract sensitive data, modify records, or potentially gain unauthorized system access. The public disclosure of this exploit means threat actors actively have proof-of-concept code available, significantly increasing the risk to unpatched deployments.

Casky's 322 matching skills leverage Claude AI with extended reasoning to detect the attack patterns mapped to TA0001 (Reconnaissance) and TA0043 (Reconnaissance) under the MITRE ATT&CK framework. Practitioners using Casky would identify suspicious patterns including: abnormal SQL syntax characters in HTTP parameters (such as single quotes, UNION statements, or comment sequences in course_year_section values); unusual database query execution patterns indicating data exfiltration attempts; and anomalous behavior from the /preview4.php endpoint showing repeated or systematic parameter manipulation. The platform's skill set enables detection of both initial reconnaissance activities where attackers probe for injection points and the execution phase where malicious SQL commands are injected, providing defenders with actionable intelligence to block exploitation before database compromise occurs.

Live Threat IntelligenceComing soon

Casky Risk Score

—

EPSS Probability

—

Shodan Exposure

—

GreyNoise Signal

—

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 →

322 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-13527.

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-2026-13527

Casky has 322 skills that investigate the attack patterns behind CVE-2026-13527. Run one and get CVSS-scored findings in 3 minutes.

Run the skill that detects this →

X Instagram LinkedIn