CVE-2026-111369ClassroomIO through 1.0.0 Incorrect Authorization via Lesson Update and Delete Routes
Updated under an hour ago ()
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It affects ClassroomIO. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.25%, higher than 15% of scored CVEs.
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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.
- CVSS
- 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
- Weakness (CWE)
- CWE-863
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.25% (percentile 15)
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
classroomio ClassroomIO classroomio:classroomio (from the name) | through 1.0.0 | CNA record |
References
- https://hackmd.io/@hieuPenguinnn/classroomio-course-resource-id-scoping-idorthird-party-advisory
- https://github.com/classroomio/classroomio/blob/v1.0.0/apps/api/src/routes/course/lesson.ts#L107-L152technical-description
- https://github.com/classroomio/classroomio/blob/v1.0.0/apps/api/src/middlewares/course-member.tstechnical-description
- https://github.com/classroomio/classroomioproduct
- https://www.vulncheck.com/advisories/classroomio-through-1.0.0-incorrect-authorization-via-lesson-update-and-delete-routesthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.