---
id: CVE-2026-30368
title: >-
  A client-side authorization flaw in Lightspeed Systems Classroom
  v5.1.2.1763770643 allows unauthenticated attackers to impersonate users by
  bypassing integrity checks and abusing client-generated authorization tokens,
  leading to unauthor…
summary: >-
  A client-side authorization flaw in Lightspeed Systems Classroom
  v5.1.2.1763770643 allows unauthenticated attackers to impersonate users by
  bypassing integrity checks and abusing client-generated authorization tokens,
  leading to unauthor…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-863
vendor: Lightspeed
product: Lightspeed Classroom
affected:
  - classroom 5.1.2.1763770643
published: '2026-04-24'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T19:17:57.183'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-30368'
references:
  - url: >-
      https://tasty-hovercraft-9b9.notion.site/Enabling-Unauthorized-Remote-Control-of-Student-Devices-with-Lightspeed-Classroom-2ec5157f5b4a800c9eefc5526479820a
    label: cve@mitre.org
  - url: 'https://truekas.dev/blog/lightspeed'
    label: cve@mitre.org
  - url: 'https://www.incognitotgt.me/blog/lightspeed'
    label: cve@mitre.org
  - url: >-
      https://www.lightspeedsystems.com/products/lightspeed-classroom-management/
    label: cve@mitre.org
  - url: 'https://github.com/truekas/ls-poc'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://tasty-hovercraft-9b9.notion.site/Enabling-Unauthorized-Remote-Control-of-Student-Devices-with-Lightspeed-Classroom-2ec5157f5b4a800c9eefc5526479820a
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-04-27T10:17:22.860099Z'
epss: 0.00344
epssPercentile: 0.25162
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/truekas/ls-poc'
  checkedAt: '2026-09-25T08:20:54.462Z'
ingestedAt: '2026-09-08T19:08:49.637Z'
---

## Overview

A client-side authorization flaw in Lightspeed Systems Classroom v5.1.2.1763770643 allows unauthenticated attackers to impersonate users by bypassing integrity checks and abusing client-generated authorization tokens, leading to unauthorized control and monitoring of student devices.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.