Cross Site Scripting in SourceCodester Online Leave Management System by SourceCodester
CVE-2026-124570

4.8MEDIUM

Key Information:

Vendor

Sourcecodester
Status
Online Leave Management System
Vendor
CVE Published:
9 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-124570?

A security issue has been found in the SourceCodester Online Leave Management System 1.0, specifically within the app/classes/Master.php file related to the Employee Avatar Upload Extension. The vulnerability allows attackers to execute unauthorized scripts in the context of a user's session by manipulating the employee avatar filename. This remote exploit can compromise user data and system integrity, making immediate awareness and remediation essential.

Affected Version(s)

Online Leave Management System 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-2026-124570 - Proof of Concept

References

https://vuldb.com/vuln/432916
vdb-entrytechnical-description
https://vuldb.com/vuln/432916/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-124570
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Smartiesxum (VulDB User)
.