CVE-2026-63228
Received Received - Intake

Authenticated Image Upload Vulnerability in Koollab LMS

Publication date: 2026-07-29

Last updated on: 2026-07-29

Assigner: CSA

Description
An unrestricted image upload vulnerability in Koollab LMS allowed an authenticated attacker to upload malicious content disguised as an image file via the feedback mail registration endpoint, potentially enabling further attacks on the server.

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Meta Information

Published
2026-07-29
Last Modified
2026-07-29
Generated
2026-07-29
AI Q&A
2026-07-29
EPSS Evaluated
N/A
NVD
CVE-2026-63228
EUVD
EUVD-2026-50123

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
koollab lms *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is an unrestricted image upload flaw in Koollab LMS. An authenticated attacker can upload malicious files disguised as images through the feedback mail registration endpoint. This could allow further attacks on the server.

Impact Analysis

An attacker could upload harmful files, potentially leading to server compromise, data breaches, or unauthorized access. Even with low privileges, this could escalate into more severe attacks.

Compliance Impact

This vulnerability could potentially lead to unauthorized access or data exfiltration if exploited, which may violate compliance requirements under GDPR (data protection) and HIPAA (health data security) by exposing sensitive user information. Unrestricted file uploads may also fail to meet security controls mandated by these regulations.

Mitigation Strategies

Disable the feedback mail registration endpoint if not required. Implement strict file upload validation to block non-image file types. Restrict upload permissions to trusted users only. Monitor server logs for suspicious upload attempts.

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