SQL Injection Vulnerability in halex CourseSEL by halex
CVE-2026-5537

5.3MEDIUM

Key Information:

Vendor

Halex

Status
Coursesel
Vendor
CVE Published:
5 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5537?

A security vulnerability has been identified in halex CourseSEL, specifically in the function check_sel within the file Apps/Index/Controller/IndexController.class.php. This vulnerability arises from improper handling of the HTTP GET parameter 'seid', allowing an attacker to execute SQL injection attacks remotely. The exploit has been made public, posing a significant risk to users of the affected versions. Despite early notification to the vendor, there has been no response on this critical issue.

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Affected Version(s)

CourseSEL 1.0

CourseSEL 1.1.0

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-2026-5537 - Proof of Concept

References

https://vuldb.com/vuln/355290
vdb-entrytechnical-description
https://vuldb.com/vuln/355290/cti
signaturepermissions-required
https://vuldb.com/submit/782202
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

Zyyyy (VulDB User)
VulDB CNA Team
JSON
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