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

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-16 · updated 2026-10-23
Weakness: CWE-639

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.

Affected products

PlayEdu: through 2.3

References

https://github.com/PlayEdu/PlayEdu
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://hackmd.io/@hieuPenguinnn/playedu-course-attachment-cross-department-authz
https://www.vulncheck.com/advisories/playedu-through-2.3-missing-authorization-via-student-coursecontroller-endpoints
https://hackmd.io/@hieuPenguinnn/playedu-course-attachment-cross-department-authz

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