SQL Injection Vulnerability in OS4ED openSIS-Classic Student Search Component
CVE-2026-103115

5.3MEDIUM

Key Information:

Vendor

Os4ed

Status
Opensis-classic
Vendor
CVE Published:
30 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-103115?

A security vulnerability has been identified in the OS4ED openSIS-Classic application, specifically within the Student Search component's CustomFieldsFnc.php file. This vulnerability allows an attacker to manipulate the cust argument, leading to SQL injection attacks. Such exploits can be executed remotely, posing a significant threat to the integrity and security of the database. Despite early notification to the project team regarding this issue, no response has been recorded. Organizations utilizing versions of OS4ED openSIS-Classic up to 9.3 should take immediate action to mitigate this risk.

Affected Version(s)

openSIS-Classic 9.0

openSIS-Classic 9.1

openSIS-Classic 9.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-103115 - Proof of Concept

References

https://vuldb.com/vuln/411871
vdb-entrytechnical-description
https://vuldb.com/vuln/411871/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-103115
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

360alphalab (VulDB User)
VulDB CNA Team
.