Cross Site Scripting Vulnerability in zhistaredu StarTraining by zhistaredu
CVE-2026-100880

5.1MEDIUM

Key Information:

Vendor

Zhistaredu

Status
Startraining
Vendor
CVE Published:
27 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-100880?

A vulnerability has been discovered in the upload endpoint of zhistaredu StarTraining versions up to 3.8.1. This issue resides within the MimeTypeUtils.java file, where inadequate validation of uploaded files can lead to cross-site scripting (XSS) attacks. Attackers could exploit this vulnerability remotely by manipulating file arguments, potentially allowing them to execute harmful scripts in the context of a user’s browser. Publicly available exploit techniques have further raised concerns regarding the applicability of this vulnerability in real-world scenarios.

Affected Version(s)

StarTraining 3.8.0

StarTraining 3.8.1

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-2026-100880 - Proof of Concept

References

https://vuldb.com/vuln/410810
vdb-entrytechnical-description
https://vuldb.com/vuln/410810/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-100880
third-party-advisory

CVSS V4

Score:
5.1
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

thmanhz (VulDB User)
VulDB CNA Team
.