CVE-2026-111369 json
ClassroomIO through 1.0.0 Incorrect Authorization via Lesson Update and Delete Routes
published 2026-10-15 24 d ago modified 2026-10-16 23 d ago also EUVD-2026-102509
- cvss
- 7.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 15%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 23 d ago
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N |
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L |
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- classroomio ClassroomIO
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
hackmd.io
/@hieuPenguinnn/classroomio-course-resource-id-scoping-idor
third-party-advisory
-
github.com
/classroomio/classroomio/blob/v1.0.0/apps/api/src/routes/course/lesson.ts#L107-L152
technical-description
-
github.com
/classroomio/classroomio/blob/v1.0.0/apps/api/src/middlewares/course-member.ts
technical-description
-
github.com
/classroomio/classroomio
product
-
vulncheck.com
/advisories/classroomio-through-1.0.0-incorrect-authorization-via-lesson-update-and-delete-routes
third-party-advisory
Sources
- CVE List CVE-2026-111369
- NVD CVE-2026-111369
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.