CVE-2026-103114
Received Received - Intake

SQL Injection in openSIS-Classic

Vulnerability report for CVE-2026-103114, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-09-30

Last updated on: 2026-09-30

Assigner: VulDB

Description

A vulnerability was identified in OS4ED openSIS-Classic up to 9.3. The impacted element is the function DBQuery_assignment of the file modules/grades/Assignments.php of the component Assignment Management Endpoint. The manipulation of the argument Tables leads to sql injection. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The project was informed of the problem early through an issue report but has not responded yet.

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Meta Information

Published
2026-09-30
Last Modified
2026-09-30
Generated
2026-09-30
AI Q&A
2026-09-30
EPSS Evaluated
N/A
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
os4ed opensis_classic to 9.3 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-89 The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.
CWE-74 The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

Attack-Flow Graph

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Executive Summary

This is a SQL injection vulnerability in OS4ED openSIS-Classic version 9.3. The flaw is in the Assignment Management Endpoint where the function DBQuery_assignment in modules/grades/Assignments.php directly uses user input from the Tables argument in SQL queries without validation or parameterization. This allows attackers with teacher-level access to inject malicious SQL commands.

Detection Guidance

Check for suspicious SQL query patterns in logs, especially POST requests to modules/grades/Assignments.php with tables[] parameter. Monitor for unusual database errors or delays in responses from the Gradebook Assignments Management feature.

Impact Analysis

An attacker with teacher access could extract sensitive database information like version or schema details. They could also modify gradebook data such as assignment titles or points, affecting grade calculations and visibility for students and teachers. The exploit is publicly available and can be launched remotely.

Mitigation Strategies

Apply input validation to the tables[] parameter, use parameterized queries instead of string concatenation, and restrict database permissions for teacher accounts. Update to the latest patched version if available.

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