CVE-2026-3007

Deferred Deferred - Pending Action

Stored XSS in Koollab LMS Courselet Enables Arbitrary JavaScript Execution

Publication date: 2026-04-23

Last updated on: 2026-05-10

Assigner: CSA

Description

Successful exploitation of the stored cross-site scripting (XSS) vulnerability could allow an attacker to execute arbitrary JavaScript on any user account that has access to Koollab LMS’ courselet feature.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-04-23

Last Modified

2026-05-10

Generated

2026-07-06

AI Q&A

2026-04-23

EPSS Evaluated

2026-07-05

NVD

CVE-2026-3007

EUVD

EUVD-2026-25170

Affected Vendors & Products

Vendor	Product	Version / Range
three_learning	koollab_learning_management_system	5.3.2
three_learning	koollab_learning_management_system	5.4.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

This vulnerability is a stored cross-site scripting (XSS) issue found in Koollab Learning Management System (LMS) version 5.3.2. It allows an attacker to inject and execute arbitrary JavaScript code on any user account that has access to the LMS's courselet feature.

Impact Analysis

Exploitation of this vulnerability could allow an attacker to execute malicious JavaScript code within the context of a user's session. This can lead to unauthorized actions such as stealing user credentials, hijacking user sessions, or performing actions on behalf of the user without their consent.

Mitigation Strategies

To mitigate the stored cross-site scripting (XSS) vulnerability in Koollab Learning Management System (LMS), users and administrators are strongly advised to upgrade to Koollab LMS version 5.4.0 immediately.

Compliance Impact

The stored cross-site scripting (XSS) vulnerability in Koollab LMS could allow attackers to execute arbitrary JavaScript on user accounts, potentially leading to unauthorized access or data exposure.

Such unauthorized access or data exposure could impact compliance with data protection regulations like GDPR and HIPAA, which require safeguarding user data and preventing unauthorized access.

However, the provided information does not explicitly detail the direct effects on compliance with these standards.

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