ClassroomIO through 1.0.0 Incorrect Authorization via Lesson Update and Delete Routes
Published Oct 15, 2026 · Updated Nov 3, 2026
Original summary
Normalized public record · Updated Nov 3, 2026
ClassroomIO through 1.0.0 Incorrect Authorization via Lesson Update and Delete Routes
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
ClassroomIO through 1.0.0 contains an incorrect authorization vulnerability in the PUT and DELETE /:lessonId lesson routes that allows any course member, including students, to modify lessons. Authenticated students can supply arbitrary lesson ids to change titles and stored HTML content or delete lessons in their course and in other courses and organizations.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- Not available
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- hackmd.io ↗
- Source repository ↗
- Source repository ↗
- Source repository ↗
- VulnCheck Advisory: ClassroomIO through 1.0.0 Incorrect Authorization via Lesson Update and Delete Routes ↗
Record history
Published Oct 15, 2026 · Last refreshed Nov 3, 2026